Lost: "Everybody Hates Hugo"

I love everything about Hurley's character, except for the weird food thing. In any case, this is a pretty great moment, chicken costume and all.

True Blood

Sookie's awesome dream romp with Eric.

Equilibrium

Christian Bale is a future cop, dedicated to stamping out emotion. But he secretly dreams about his dead wife.

Battlestar Galactica.

Roslin trips balls. At the Opera House. Which really ought to have a ballroom.

Terminator: The Sarah Connor Chronicles

This show did some great dream bits, in homage to T2, but this bit from the pilot may be the greatest.

Serenity

River finally has a dream which helps her figure out the meaning of the cryptic "Miranda"

Twilight: New Moon

Final proof that Edward really is dreamy. Apparently.

CJ7

Dicky dreams his alien dog has given him special sneakers to wear to school, which make him unstoppable... almost.

Stargate Atlantis

Remember the stomach-bursting dream from Aliens? SGA pays homage to it...

Smallville, "Lexmas"

Lex gets hit on the head and dreams of the life he'll never really have.

Supernatural "Dream A Little Dream Of Me"

Bobby's trapped in the dream world with his scary wife, so Dean has to come in and get him.

Paprika

A Scanner Darkly

If you watch carefully, when he gets his brains blown out, they turn into cockroaches. Or aphids, maybe.

The Science Of Sleep