This one has the old time travel paradox - at the end Kryten says they are in a redundant timeline and the events that have transpired won't have happened and they won't have any memory of them. Fair enough.
But this is only because they block the white hole with a planet. If they go back to before they did this, the white hole will still be spewing time into the universe. Of course, the engines wouldn't be dead and they would be able to steera course away from it I suppose.
But if they go back to a point before it all happened, wouldn't Kryten still get the idea to increase Holly's IQ and resurrect the Talkie Toaster, thus causing the same problem all over again?

There is a continuity error when time starts repeating itself for the first time. Love that scene. First we see Kryton in the middle of the room. Then we see Lister say something. Then Kryton says something only this time his back is to a wall. Then we see Kryton in the middle of the room again.

This is one of my favorites. The scene mentioned above is great. Also, I like the sequence where Lister is playing planetary pool. A thought...to prove that Lister was doing a trick shot, couldn't he have written it down on peice of paper in a sealed envelope? That would prove it to Rimmer (although he still wouldn't believe it).

So what happened between the last episode and this episode for Holly's IQ to take such a drastic plunge. Sure Holly had been slipping, but the Cat says she's been counting by banging her head on the screen, which seems much worse than anything we had seen in a previous episode.

So why weren't Kryten and the others in the science room when Holly's memory was increased? Yes, it was a great scene between her and the toaster, but I can't figure out why they wouldn't be there in the first place.

If Rimmer's hologram is such a tremendous drain on ship's power, then how can he leave the ship for long periods of time? Either his light bee has some industrial strength batteries, which could be used instead of ship's power, or Holly is transmitting that energy through space, and in Backwards, through time.

When Rimmer and Kryten are bringing supplies up from the cargo decks they have a bunch of boxes on a dolly, but when the time pocket occurs, they are now on the side of the hallway and the supplies are nowhere to be seen.

While the pool with planet was fun the problems are astronomical. ;-)
First, the graphics show the planets whizzing around the suns. The fastest known planet (Mercury) takes 88 days to do that. The fastest alledged planet (one of those objects astronmers think is a planet around another star) orbits in 4 days. If the graphic was an accurate representation then those planets orbit in seconds.
Second, planets are thousands to millions of miles away from their suns, so set off a thermonuclear explosion in the star, a solar flare is ejected, several hours to several days later it hits the planet, somehow has enough force to knock the planet out of orbit, where it spends a couple of days flying over to the other solar system to knock its planet out of orbit... etc., etc. A very, very generous real time estimate would say that all this could not happen in less than a week. Of course, maybe the white hole has speeded up the time factor, but what if one of those time jumps occurs? Or if time started running backwards for one solar system? Yikes!
Also these planets apparently don't have atmospheres or bodies of water and must be incredibly solid since the solar flare didn't burn up the atmosphere and we see the planets hit each other like cue balls.

The graphic shows 4 objects rotating around the green planet, but the shot of the green planet shows no evidence of moons, but the graphic shows these objects rotating until the planet goes into the hole. If these rotating objects do represent moons, then why didn't the gravity of the other planet disrupt their orbits?

Holly's IQ dropped because Lister has probably been throwing away his leftover curries somewhere where they get into Holly's circuits or something.
The Boys From The Dwarf had probably found an old X-rated movie left behind by Peterson - that would be more important to them than increasing Holly's IQ.

Some things to ponder:

Talkie Toaster has changed shape since Waiting For God & now has a voice like Kryten had when we first met him. (Could the events of Stasis Leak & Timeslides changed history to do this?)

Kryten says there are no lasers, but couldn't they use the bazookoids?

Another 47, the favourite page of Lister's Biology book. (Where does the significance this number come from?)

Why don't they go into Starbug before? & where's the power to open the hanger door?

The significance of 47, for nitpickers at least, comes from Star Trek: The Next Generation, where one of the writers began using the number 47 in all his scripts. Other writers started doing it as well and now it's a really overused Star Trek gag.

The subplot of how helpless Lister and The Cat are with no electrical power as "everything on the smegging ship's electric, man" reminds me of one of the more haunting accounts from the North Tower on 9/11. The security officers in charge of the system kept trying to get the computers to open the doors and release people who were trapped, but the impact of the plane had destroyed the automatic systems, and all they got was ACCESS DENIED when they tried to free the doors. There should always be a manual backup/override that does not require power or computers.

I guess Holly gave up on the idea of the IQ increase, as it's never brought up again.

Considering it would shorten her life to a few minutes, I think forgetting about it was the right move.

Good point.

Keith Alan Morgan on Friday, August 13, 1999 - 2:20 am: So what happened between the last episode and this episode for Holly's IQ to take such a drastic plunge. Sure Holly had been slipping, but the Cat says she's been counting by banging her head on the screen, which seems much worse than anything we had seen in a previous episode.

Just before they head to the science lab, Cat remarks that an ion storm was responsible.

The laws of physics take a beating in this episode.

Of course, Rule Of Funny