Timescape : Picard succumbs to "temporal narcosis," gets silly and draws a smiley on the gas plume of a warp core breach. At the end of the episode, Data experiments with relative temporal perception by watching a pot boil.

 

Timescape is a Bragastrosity, so despite the cute bits there's a staggering amount of bullshit that comes with it - anyone who's seen Generations, Nemesis, or more than forty seconds of Voyager knows what I'm talking about. The man (along with Berman) claims to understand Trek better than anyone - I'd argue that it's the same type of understanding a retard has of mental illness.

Much to my surprise, Benito Martinez (Aceveda in The Shield) popped up for five seconds as a transporter technician in part II of Descent (the Lorg vs. Hugh thing). Shortly after that (relatively speaking), BLAM!. Terry O'Quinn (John Locke in Lost) guests as Admiral Pressman in The Pegasus.*

 

* No, not THAT Pegasus. The other one. Though the commander of the current BSG Pegasus just happens to be Michelle Forbes, who played Ensign Ro in several episodes of TNG. For the win!

Point of nerdliness : The Pegasus is the same class as the Grissom, a wonky looking thing what got blowed up in The Search For Spock.