The "Trip Runs Around In His Skivvies" episode!
WOOO-HOO!
Not Quite A Spoiler:
Section31.com quotes Braga as saying "There's an episode where the Ferengi take over the ship and Trip spends the entire episode in his underwear, running around the ship like Bruce Willis." I suspect this is it.
Ferengi. Why Ferengi? Why not Tellarites, or Orions? Are they still trying to amortize leftover ear pieces from DS9?
I suspect (i.e. HOPE) that Braga was joking.
http://tv.zap2it.com/sciencefiction/otherworlds.html?23646
"Trinneer is seated in his incense-scented trailer on the Paramount lot, with a striped Calvin Klein robe covering, once again, those bright-blue Starfleet-issue skivvies.
'Literally, I don't say a word today,' he says. 'I'm just running around in my underwear.' "
"Whatever the plot line, the scenes Trinneer is shooting are eerie. Clad in the aforementioned skivvies, he wanders barefoot around the launch bay, which is quiet and deserted. In another scene, he heads to engineering, where bodies of crew members can be seen. As Trinneer said, not a word is spoken, with all the work being done through facial expressions and body language."
According to Section31.com, it is the Ferengi, but we never *officially* find out they're Ferengi.
Jeffrey Combs and Ethan Philips are supposed to be Ferengi in this episode (the return of Brunt and the fake Grand Proxy!?!??? 
).
This introduces a nit. If the Ferengi knew about us back in 2151/52 (What month was Broken Bow?), then why didn't they make an appearance in the next 200 years to try to sell us stuff and rip us off?
.... Trip runs around in his skivvies..... whoa! (pant, pant, pant) I gotta tape this episode.... ;) 
It's going to be interesting to see how they make a Ferengi ep without breaking TNG continuity
hmmm
"bodies of crewmembers"
Sounds like some extras besides that time travel guy are going to die. (I doubt it though)
Combs as a Ferengi? Geez, if he keeps this up, he's going to catch Vaughn Armstrong with the most roles on ST. Although Armstrong keeps getting different roles as well, so probably not.
Why the Ferengi don't try to sell us garbage for 200 years can be explained. They and us (but the "Enterprise crew") see them mistake T'Pol for a Romulan. They think "these humans have decent, but not great technology. They are allied with the Romulans. If they put two and two together they'll be mad at us to the point of declaring war. We don't want to face the Romulans. Let's hide and not let them discover us."
Of course, it will not be that clear-cut. It will be nit full and Archer at the end of the series hits the reset button.
Oops,
The above should read us (but NOT the "Enterprise" crew)
Combs as a Ferengi? Geez, if he keeps this up, he's going to catch Vaughn Armstrong with the most roles on ST. Although Armstrong keeps getting different roles as well, so probably not.
He'll also join Armin Shimerman and Max Grodenchik in playing multiple Ferengis.
Ethan Phillips played a Ferengi in The Next Generation, I am not sure of the episode but it might have been Menage a Troi.
It was.
He also played Neelix disguised as a Ferengi in "Profit Motive".
Neelix was a Ferengi in 'False Prophets' - 'Prophet Motive' was the DS9 episodes where one of the Orbs made the Grand Nagus kind and very un-Ferengi
I'm thinking that this is gonna be the "worst episode ever," to quote the Comic Book Guy.
No, the worst episode was "Profit and Lace".
PS Did anyone think it might be a good episode when they saw the previews.
It's possible that this won't be a terrible episode.
By "worst episode ever" I meant "worst Enterprise episode ever." There a plenty of Star Trek episodes that this one CANNOT reach when it comes to general lousiness. Sub Rosa, anyone?
We don't reach, Herbert.
Annonymous,
It is possible that monkey's fly out of T'Pol's bum while Malcolm stares at it.
You're busted, CCabe. That's the "Episode whose name we dare not speak!" Or was that your evil twin talking?
I said it, and I'll say it again PROFIT AND LACE. (If anyone gripes I'll use bold font next time. Ni!)