Ok, folks. Let's concentrate the time travel discussions in here. Oh, my brain hurts!

Back to the Future: Part II! No, stop, the horror...doesn't make sense...Dreamland I and II...the agony...Star Trek IV...aaaaaagh!

Oh yes and many, many others. Different theories, different changes to the universe etc. etc. etc.
Therefore I thought it was a good idea to lure all competent nitpickers to this spot for comparing and discussing this kind of weird stuff.
And MikeC, Aspirin works great ! ;-)

And you haven't even mentioned "12 Monkeys"

Take two bottles of asprine and call me yesterday morning.

Electron, don't be so negative!

Wrong board, Proton !

Ok, seriously now:
I tried to draw a diagram of "Yesterday's Enterprise".
Here we have the unaltered timeline, the big jumps and the resulting slightly different timeline (with Sela). What do you think about that ?
N...Battle at Narendra
A...the Anomaly
C...1701C
D...1701D
D'..the Klingon War

It worked with the upload! Fine!

Here is an interesting URL: Relativity and FTL travel. It's about Star Trek's theorie of warp and time travel.

I'm surprised nobody has mentioned the theory of time travel presented in Douglas Adams' "Hitchhiker's Trilogy".

Adams takes the approach that there really is only one universe/timeline, and that yes, it is possible to travel back in time and change the past, in which case the present changes as well. But your memory of the present doesn't change.

Or maybe it does--human memory isn't very accurate. The paradoxes, he says, are 'scar tissue' left behind when someone performs surgery on the timeline. People remember whatever version of events makes the most sense to them, and get on with their lives.

That's why his world can have the Cathedral of Chalesm, which was built and then retroactively un-built to make room for heavy industrial development, the Restaurant at the End of the Universe, where you are assured of never meeting yourself on successive visits because of the embarrassment this usally causes, and the Aorist Rods, energy-producing devices that worked by extracting energy from the past and were eventually banned because people from the future kept using them on the present.

In essence, Adams dismisses 'temporal logic' as an invention of the human brain in its attempt to deal with an illogical world. Temporal logic doesn't give you a headache--your headache gives you temporal logic.

Just thought I'd share this.

Let us not forget The Outer Limits' "Virtual Future," "Stitch in Time," and "Tribunal"; The X-Files' "Synchrony"; Hercules: The Legendary Journeys' "End of the Beginning"; Sliders' "As Time Goes By"; the television series Seven Days; and the films Timecop, Lost in Space, Somewhere in Time, Terminator and Terminator 2: Judgment Day, Millennium, Bill & Ted's Excellent Adventure and Bill & Ted's Bogus Journey, Teenage Mutant Ninja Turtles 3, Star Trek: First Contact, etc. I dare not mention Star Trek, considering I notice much too many discrepancies with the introduction of each time-travel theory. For example, Star Trek IV: The Voyage Home and an episode of Star Trek: The Next Generation in which a disembodied head pertaining to Data is excavated from Earth both imply the Time Loop Theory. For those of you who are not aware of the Time Loop Theory, which was stated by Albert Einstein, it functions as follows: I give you a watch, which you gave me when arriving in the past, to give to me after you have journeyed into the past that was given to you by me from you, etc., etc. The movies 12 Monkeys and Somewhere in Time are prime examples of the Time Loop Theory. In accordance to this that would mean all other time-travel escapades our Star Trek crews participate in shall result in a sequence of events that are inalterable. Yet, they are altering time left and right in direction contradiction. In other words, I believe that either the Time Loop Theory or the Time Alterability Theory may apply, but not both.

...direction contradiction... = ...direct contradiction... Typo.

D. Stuart,

"Time's Arrow Pt1 & Pt2" (The Data's head episodes) did not imply the Time Loop theory. It is strictly causal.

Timeline (Calendar)

18xx:
Data appears from time warp
Rest of command staff appears from time warp
Data loses his head
Staff (sans Picard & Data's head) returns to future with Data's body and S. Clemens
Picard scratches message into head
Clemens reappears from time warp
Picard returns to 24th century, leaving Data's head
23xx (pre TNG):
Soong creates Data
23xx (TNG):
Data's head found
Data enters time warp
Rest of staff enters time warp
Staff&Clemens return w/o Data's head or Picard, but with Data's body
Geordi reattaches found head, gets message
Clemens returns to 19th century
Picard returns to 24th century

Data's personal timeline:
23xx(PreTNG): Soong creates Data
23xx(TNG): Data enters time warp
18xx: Data loses head.
Body is returned to 23xx, leaving head behind
Picard scratches message in head
Picard returns to 23xx leaving head to be found later
23xx: Data's head is found
23xx: Data reassembled

Please note that from Data's head's point of view, there is a single linear time line that goes from 23xx to 18xx, and then goes forward with no more time warps (that are relevant to this).
From Data's body's point of view: there is a single linear time line that goes from 23xx to 18xx and back to 23xx (via time warp), and then continues forward.

Essentially Data's head is 500 years older than his body, and yet this creates no paradox.

By the way, that The Outer Limits episode is "The Tribunal." I forget the word the for a moment.

This pertains to the film Lost in Space.

The time-travel paradox to this film is truly multi-explanatory, something of which the creators/writers ought to have avoided due to the anti-clairvoyant lore of most audiences. For starters, keep in mind that the Jupiter 2 consortium had penetrated a spatial bubble resemblant to the one upon the planet's surface prior to encountering the alien spacecraft. Consequently, they had never technically returned to "their time" prior to the conclusion of the movie. With the distinction between terrestrial and spatial senescence, however, perhaps there would be an age difference anyway (i.e., between Jupiter 2's and Earth's inhabitants).
As this movie was initially progressing, it was implying the Time Loop Theory. For those of you who are not aware of the Time Loop Theory, which was stated by Albert Einstein, it functions as follows: I give you a watch, which you gave me when arriving in the past, to give to me after you have journeyed into the past that was given to you by me from you, etc., etc. The movies 12 Monkeys and Somewhere in Time are prime examples of the Time Loop Theory. This notion was furthered when Mr. Robinson and Maj. Don West traversed the time bubble and soon acquainted themselves with the future counterpart of Will Robinson, more so because this future counterpart of Will Robinson attested to the fact that Mr. Robinson and Maj. Don West had apparently vanished from the past when entering the time bubble and appearing to never return. Then, in direct contradiction, Dr. Smith and Will Robinson traverse the time bubble! If this film was, in fact, conforming to the Time Loop Theory, then perhaps this would be contingent (i.e., if and only if Will Robinson and Dr. Smith returned to the exterior of the time bubble). Otherwise, the future counterparts of Will Robinson and Dr. Smith ought to have become nonexistent and surrogated by their past counterparts. But then again, there is another time-travel theory. This theory states that once an individual or individuals protrude through time, that individual or individuals are outside of the effects of time-travel and thus could murder oneself or themselves and not be erased from existence. The foundation of this theory may apply to the film, considering they then had the fuel capsule and reconstructed Robot from the future placed aboard the past counterpart of Jupiter 2, remaining existent might I add, and even a plausible glimpse of how Jupiter 2 collides with foreign planetary debris and detonates.

This pertains to the film Timecop.

During the introduction to this movie in which Melissa Walker is slain by Sen. Aaron McComb and his accomplices, it is quite obvious that this murder was conducted so as to eliminate the threat of Max Walker exposing the time-travel intentions of Sen. Aaron McComb. And if this were to be true, then Sen. Aaron McComb's past counterpart ought to have already been opulent from successful investments advised by the future counterpart of Sen. Aaron McComb, not to mention the fact that Max Walker would be hapless to alter the past. Thus, it would seem the movie is conforming to the Time Loop Theory. For those of you who are not aware of the Time Loop Theory, which was stated by Albert Einstein, it functions as follows: I give you a watch, which you gave me when arriving in the past, to give to me after you have journeyed into the past that was given to you by me from you, etc., etc. The movies 12 Monkeys and Somewhere in Time are prime examples of the Time Loop Theory. However, we find that Sen. Aaron McComb, ten years down the road, struggles to acquire access to the TEC (Time Enforcement Commission) program, while descending into the past to cause his past counterpart to be opulent enough to have purchased the TEC (Time Enforcement Commission) program all together. Not only that, but Max Walker seeks to alter his own past and, in the process, to alter Sen. Aaron McComb's efforts to toil with the past. To shed some light on this topic, the movie ought to have commenced with Sen. Aaron McComb being confronted by a Max Walker from the future, resulting in Sen. Aaron McComb's death and the prevention of the death of Melissa Walker. Unless my theory of how Max Walker could have accomplished this with the alterability of time is true, then this would signify how inconsistent the creators/writers of this film and literary concept were regarding the implied time-travel notion (i.e., the Time Loop Theory). My theory indicates that Max Walker had prevented Sen. Aaron McComb from exploiting time-travel for his own avaricious endeavor but was killed in the line of duty. Sen. Aaron McComb and his accomplices then proceeded to descend through time and to attempt to sabotage Max Walker's past. Due to their disruption in Max Walker's past, Max Walker became more aware of what dangers lurk in the shadows and thus prevented his imminent death. By doing this, he also found himself descending into the past and altering the time line entirely. But then again, this is my theory.

This pertains to the films Back to the Future, Back to the Future Part II, and Back to the Future Part III.

I wish to introduce a solution to the paradox involving Marty not having a reason to alter his parents' past and thus does not alter it but therefore has a reason to alter it, etc., etc. Let us presume for a moment that the Marty raised by the altered Mr. and Mrs. McFly remains the same rock-playing, slightly procrastinating adolescent hero. Likewise, let us presume Dr. Brown's premonitory knowledge of his death does not affect Marty's descension into the past. If these two factors are not altered, then Marty's pivotal change may not be the least bit hindered. Allow me to explain. You see, Marty had not intentionally altered his parents' past; it was unintentional. He witnesses his father plummet from an above tree and promptly pushes his father out of the way of an approaching car. Considering Marty and his personality are not altered by his parents' different route in life (and siblings', for that matter), he would have still befriended Dr. Brown, journeyed into the past, and pushed his father out of the way of that approaching car. The only thing that I theorize could be affected is the photograph. Since Marty and Dr. Brown successfully averted Marty's and his siblings' nonexistence, the photograph's content would not be vanishing. However, this minor flaw may then cause Marty not to assure his parents' intervention and this would in turn affect the future, etc., etc.
Throughout the entire Back to the Future consecution I never appreciated how they would throw in a sporadic time loop scenario. For those of you who are not aware of the Time Loop Theory, which was stated by Albert Einstein, it functions as follows: I give you a watch, which you gave me when arriving in the past, to give to me after you have journeyed into the past that was given to you by me from you, etc., etc. The movies 12 Monkeys and Somewhere in Time are prime examples of the Time Loop Theory. Returning to my unappreciation in regard to the time loop scenarios presented within this consecution, I wish to indicate them and express a theory as to how this is such a discrepancy. For starters, the lead singer of the band at Marty's parents' dance is the cousin of the alleged conceiver of rock 'n' roll music. During Marty's "performance," they far exceed implication and make it perfectly clear that it was Marty's enacting rock 'n' roll that inspired the conceiver of rock 'n' roll to develop this particular genre of music. However, if this were the case, then Marty's parents' future would not and could not be altered. This applies to the other two films as well. And secondly, Lorraine has the name Marty fluttering about her mind as Marty departs. Makes you wonder whether or not Marty's name had its origin at that exact moment. I believe there were other time loop scenarios, but none are coming to mind currently.
One last comment. Have any of you not cogitated as to how someone of the present is capable of developing a device that may journey into the future? In all consideration, someone could not ascend to the future because it has not occurred yet. And when someone would journey to the future, in all likelihood that individual would no longer exist in the past. The same way you skip a rock on a lake. If you were to remove one of those points of contact the rock has with the water's surface, the rock would presumably cease skipping. If Marty had, in fact, caught a glimpse of himself (or as it was, Jennifer), that Marty would plausibly be the future counterpart of the Marty that returns to the past and lives out his thirty years. But oh contraire, the sequence of events that followed Marty's, Jennifer's, and Dr. Brown's ascension into the future would place into account Marty and Dr. Brown rectifying the future counterpart of Biff conferring with his past counterpart. Resultfully, Dr. Brown is launched further into the past (i.e., eighteen eighty-five). Marty proceeds to journey into the past and prevent Dr. Brown's death, during which time he discovers that he shall have a car accident that cripples his one hand and thus incapacitates him from ever becoming a prominent musician. When realizing this, Marty does not have the car accident. With this one subtle alteration the future counterpart of Marty that Jennifer observed ought to have been a successful, commendable musician.

This pertains to a discussion between Mr. Jefferson and I within Sliders:Season One:Pilot, but I do believe it supports some pertinence to this particular sub-section.

My perception of a "double," or a dimensional counterpart (or past or future counterpart, depending upon the time and space a counterpart occupies) as I prefer to call it, is something by which I stand. However, I am willing to listen to theories proposing otherwise. You see, I consider a "double" to be a parallel dimension's "version" of oneself. For example, let us say I was born on October 7, 1923, at 4:38am. In a myriad of other coexisting dimensions a similar infant is born on October 7, 1923, at 4:38am. My name is Albert Hawking; the other coexisting dimension's grown infant's name is Stephen Einstein. I have blue eyes; the other coexisting dimension's grown infant has brown eyes. I am 5'7"; the other coexisting dimension's grown infant is 6'1". I came into this world at that approximate moment in time and space (i.e., October 7, 1923, at 4:38am), as did a myriad of other infants in coexisting dimensions. Although the infants from day one may be slightly or entirely different (e.g., a different gender) or even make different decisions during their lifetimes than I, we are all technically one and the same. Furthermore, there is the perplexed function and ramifications of time-travel. What if I journeyed back in time and caused my father to inseminate my mother two weeks earlier than when he had previously? What if it results in me being born a female? Would this make that infant not my "double?" And what of myself? I return to my present and discover that I am now a female. Was the male "version" of me that had descended into the past to begin with not a prior yet now nonexistent "double" of me? In fact, time-travel and parallel dimensions are rather intertwined when you stop to cogitate it for a moment. There are crucial moments in our lives that may lead us in one direction but could have led us in multiple directions with distinct results accordingly. So in conclusion, I see no reason why there could not be a female "version" of me in a parallel dimension. And from her perspective, I would be a male "version" of her. Think beyond conventional comprehension and be more clairvoyant. There is much that shall remain unanswered if all individuals are inclined to believe only what they may observe with their two substantial eyes or what they identify as being most "plausible." Retain my words and then propose another theory. Thank you.

Try to draw a timeline diagram for BTTF. That would be a little bit chaotic I guess.

But oh contraire, the sequence of events that followed Marty's, Jennifer's, and Dr. Brown's ascension into the future... But [au] contraire, the sequence of events that followed Marty's, Jennifer's, and Dr. Brown's ascension into the future... What if it results in me being born a female? = What if it results in [my] being born a female? Typos.

Typos are allowed on this board.

No they aren't.

Furby, bite them !

Add the movies Time Bandits, Beastmaster or solely Beastmaster 2: Through the Portal of Time, Biggles: Adventures in Time, Trancers 1-5, and Timestalkers and The Outer Limits' episode "Déjà Vu" to the list. As a matter of fact, would someone be so kind as to provide individual synopses for Time Bandits, Beastmaster or solely Beastmaster 2: Through the Portal of Time, Biggles: Adventures in Time, and Trancers 1-5? Thank you.

Other noteworthy movies/TV episodes include The Ray Bradbury Theatre's "Zero Hour" (i.e., the one in which humans may hunt dinosaurs by journeying into the past), Disaster in Time, and the HBO original movie Retroactive.

D.Staurt You mentioned the time loop theory, and brought in Somewhere in Time as one of the two movies as an example for your explanation. Now about that watch theory, [funny though, there happens to be a watch in the movie], well what about that watch? My point is, where exactly did that watch come from?
You see, if the time loop in Somewhere in Time was meant to be, Reeve's character was meant to go back in time, to meet and romance Seymore's character, which she gave the watch, which he gave her, to give to him, when she was much older, and when he hadn't gone through time yet. It wasn't Reeve's character's watch. She gave it to him. It wasn't Seymore's character's watch, she happened to be holding it, when he disappeared and returned to the present. And thus the cycles goes. That watch is material. It had to come from somewhere. This bogs my mind!!

D. Stuart, I think the Ray Bradbury episode you are referring to is "A Sound of Thunder", where time travellers hunt dinasours in the prehistoric era. "Zero Hour" involved alien invaders making use of small children to consumate their invasion plots and time travel was not a feature of that story's plot. At least I think that's correct.

That parralell us idea is still bad, even if our and their ancestors were conceived on the same dates and time the probability of our genes being the same as another in those cicumstances (same parents, ovum and sperm to fertilise them) would be somewhere in the region of 1/2^23 would it not, I am calculating (in my head so work it out yourself) 1/8388608. That would be multiplied by itself for every generation that had to be identicle. ((1/2^23)^n) when n is the nuber of generation of human ancestors. There would also be the high probabilities of interference as a result of divergence between the worlds.

Opera Ghost--

You are missing something in the parallel universe "theory." In science it has been thrown about that due to certain quantum mechanical laws, for any decision made by any person, all the possible options of the decision actually occur but in "parallel" universes. Thus there would be universes out there that were exactly like our own, because sometime in the future a decision will be made in ours, and the other option(s) will be taken in "thier's."

Other movies involving time-travel entail The Philadelphia Experiment I and II, Frequency, Austin Powers 2: The Spy Who Shagged Me, and the original TV movies Nostradamus and The TimeShifters, as well as, I suppose, Star Trek: Generations. Other TV episodes involving time-travel entail The Outer Limits' "Breaking Point," "Decompression," "Final Appeal Part I," and "Final Appeal Part II." Other individuals and certified members can expand upon this list. Oh, and there are various episodes with time-travel as the main theme in a modicum of episodes hailing to Star Trek, Star Trek: The Next Generation, Star Trek: Deep Space Nine, and The Adventures of Brisco County, Jr.

I like what they did with time travel in Austin Powers II... they did not try to explain it. They basically said, "We know that what were doing with time-travel here doesn't make a lot of sense, but, hey... just try to enjoy yourselves.

How many different time-travel "vehicles" have there been in the movies (as opposed to "devices" or "doorways" or mysterious mists)?

1. The DeLorean (Back to the Future)
2. The Starship Enterprise (The Naked Time, et al)
3. The Klingon Bird-o-Prey (STIV)
4. A phone booth (Dr. Who)
5. Another phone booth (Bill & Ted's Adventures)
6. A motorcycle (Timerider? movie starring Fred Ward)
7. The Time Machine (from the movie of the same name). Yes, this is more of a "device", but it's so classic I had to include it.
8. Also above from Time After Time.
9. The Borg Sphere (ST: First Contact)
10. Buck Rogers' spaceship.

More?

11. The sea ship featured in that X-Files episode that was shot in widescreen (past and future meet).

12. The airplane in The Langoliers

13. The USS ? in The Final Countdown

You know, most of those devices do require a Temporal Mechanic to fix. I guess if he bangs around enough, the noise could give you a headache...

>4. A phone booth (Dr. Who)>

I believe the was a police box instead. In England, police boxes are blue, and phone booths are red.

Ccabe -- my mistake. I've only seen the show a couple times.

Was the male "version" of me that had descended into the past to begin with not a prior yet now nonexistent "double" of me? = Was the male "version" of [myself] that had descended into the past to begin with not a prior yet now nonexistent "double" of [myself]? Typo.

Although the Sliders:Season One:Pilot debate has extinguished nearly a year and a half ago, attempting to define "doubles" in scientific terms may inevitably find their probable answers in other philosophies or beliefs, such as religion. A fascinating article in Newsweek roughly two years ago featured numerous references to how science and religion can be and are connected and various discrepancies that are acceptably solved by applying one of the two fields (i.e., either science or religion). In addition to all this, the true definition for and explanation of "doubles" can be summarized in this Latin phrase: ignotium per ignotius. It means explaining the unknown by means of the more unknown.

Another time-travel vehicle used is the telephone booth from Bill & Ted's Excellent Adventure and the subsequently released Bill & Ted's Bogus Journey.

Particularly nasty (temporally) in Bill&Ted is the fight sequence at the end where Bill&Ted and the bad guy each say that "When I win, I'll come back and put XXX here", at which point, XXX magically appears for that person to use.

To revise an old thread here, "Frequency" seems to make use of the Late Douglas Adam's theory that there is only one timeline, and that when paradox's occur, you have memories of both. This also seems to use Janeway's headache theory as well, since I think Chief/the son can relate by having two memories of two different pasts, and thus be confused. I wonder if this can actually happen, having a memory of the previous past, and then when it changes, have the memories of that one too.

Does Anyone Really Know What Time Is?

The article even uses our favorite treknobabble: "Temporal Anomaly".

ScottN:Does Anyone Really Know What Time Is?

Erm... about half past three. [sorry, couldn't resist...]

Nit. It asked what time is, not what time it is!

My (blatantly stolen) Answer: Time is Nature's way of keeping everything from happening at once.

Well according to author Robert Rankin, extrapolating from the idea that 'time flies when you're enjoying yourself' there is a conspiracy by the elite to control time. This is achieved by additives in soaps and other products used by the lower classes, which makes time move more slowly for them, so they get more work done.

This is the same guy who suggests that the mammoth is not extinct, and the reason we don't see heards of mammoth sweeping majestically across Siberia is that the mammoth is in fact a burrowing animal. And they die when exposed to light. (Which is why the Russians keep digging up remarkably well preserved mammoth carcasses.)

That sounds like the same mentality that insists jet contrails are some kind of chemical being seeded throughout the skies to control the population.

And doing a poor job of it I might add!

From "The Journeyman Project" series of Video games.

15: The Pegesus Device
16: The Jumpsuits
17: The Chemeleon Suit

From Sierra's Video Game "Space Quest IV"
18: Time Gun
19: Timebuster 2000 SUX

Re: #13. It was the USS Nimitz, and the Nimitz wasn't the time machine, it went through a "portal". Don't think it counts.

20. The "time sled" from TimeCop.

Re #4- the device isn't a police box, either, it's a TARDIS (Time And Relative Dimensions In Space) which has been configured to look like a police box.

Did I actually type the words "anti-clairvoyant lore?" Talk about techno-babble.

Other movies/programs include Terminator 3: Rise of the Machines (debatably adhering to the Time Loop Theory suggested in its first chapter with regard to the whole Kyle Reese/Sarah Connor offspring and all), Austin Powers 3: Goldmember (just slightly), the upcoming Michael Crichton book-turned-movie Timeline, as well as the future movie release The Butterfly Effect (an Ashton Kutcher film), The Time Machine (George Pal version), The Time Machine (2002), Time After Time, "The Time Tunnel," and at least one episode of "Conan: The Adventurer."

Actually, Timeline (at least the novel) is temporally consistent. It belongs to the "unalterable timeline" theory. Everything that has happened, happened.

In the novel, they find the glasses way before (in their personal timelines) they go back and cause the glasses to be left in the church.

The Shining (Stanley Kubrick version), "The Shining" (1997), Black Knight, A Kid in King Arthur’s Court, A Connecticut Yankee in King Arthur’s Court, Flight of the Navigator, Les Visiteurs, Couloirs du Temps: Les Visiteurs 2, La Jetee, Just Visiting, Army of Darkness, It’s a Wonderful Life, Peggy Sue Got Married, Planet of the Apes (Franklin J. Schaffner version), Planet of the Apes (2001), Beneath the Planet of the Apes, Escape from the Planet of the Apes, Kate and Leopold, Trancers 6, Happy Accidents, Superman (at the end, that is), The Final Countdown, The Kid, Jumanji (at the end, that is), The Blue Yonder, Lara Croft: Tomb Raider (at the end, that is), Tangents (really awful movie, mocked on MST3K), Time Runner, a "Doctor Who" episode, and "Brimstone" episode "It’s a Helluva Life." Someone also mentioned the TV movie "The Langoliers."

"King Arthur and the Knights of Justice."

Futurama episodes "The Why of Fry" and "Roswell that Ends Well" and a compiled list of the various "Star Trek" series episodes I faintly touched upon in a previous post.

For "Star Trek: The Original Series," there's "The Naked Time," "Tomorrow is Yesterday," "The City on the Edge of Forever" (obvious one), "Assignment: Earth," "The Alternative Factor" (debatably), and "All Our Yesterdays."

For "Star Trek: The Next Generation," there's "We'll Always Have Paris," "Time Squared," "Yesterday's Enterprise," "Captain's Holiday," "A Matter of Time," "Time's Arrow Parts I-II," "Timescape," "Cause and Effect," "Firstborn," "Tapestry," "All Good Things...", and maybe "Where No One has Gone Before" and "Journey's End."

For "Star Trek: Deep Space Nine," there's "The Emissary," "Past Tense Parts I-II," "Visionary," "The Visitor," "Little Green Men," "Accession," "Trials and Tribble-ations" (classic!), "Rapture," and "Children of Time."

For "Star Trek: Voyager," there's "Parallax," "Time and Again," "Non Sequitur," "Future's End Parts I-II" (which doesn't really make any sense at all), "Before and After," "Year of Hell Parts I-II," "Timeless," "Relativity" (entertaining yet wasteful episode), "Fury," "Shattered," and "Endgame Parts I-II." Did I miss any time-travel episodes for this series? There were certainly an awful lot.

For "Star Trek: Enterprise," there's "Broken Bow Parts I-II," "Cold Front," "Two Days and Two Nights" (interesting that Picard and Archer should both be visited by possible time-travelers while on vacation), "Shockwave Parts I-II," "Future Tense," and "The Expanse." That's only for now, but this entire series is built on the foundation of a time-travel story arc.

Instead of posting one relatively inane post after another, just a quick note to everyone fascinated with the notions of temporal mechanics, time displacement, etc.

Prof. Stephen Hawking's named "The Alterability Theory" the alternative histories hypothesis. Likewise, he's named "The Time Loop Theory," or as ScottN labeled it, "The Unalterable Timeline Theory," the consistent histories conjecture. The latter I'm hazy on, only because I don't have my copy of A Brief History of Time off hand at the moment.

Primarily, I'm notifying everyone of an emerging forum in The Kitchen Sink: Science Related titled "Time Travel: Practical Application." Everyone's welcomed to contribute their input, opinions, theories, etc. This forum, quite frankly, has been filled to the brim.

Oh, and yes, there was the "Star Trek: Deep Space Nine" episode "Time's Orphan."

Godzilla vs. King Ghidorah and "The Outer Limits" episode "Patient Zero," as well as the cartoon series "Time Squad."

I noticed someone up there mentioned Douglas Adams' "Aorist rods." What book was this from? I remember reading an online version of the "Hitchhiker's Guide" which had an entry for Aorist rods, but I don't remember such a thing from any of the Hitchhiker novels, and I've been through each one at least thrice.

Okay, I went to Google and typed in "Aorist rods" and found they were from "Young Zaphod Plays it Safe," the one thing from the HHGttG universe that I never read. That settles that.