The one where they were trapped around the time warped planet was REALLY cool.
The doctor is now the oldest one of the ship, hehe. It proves that his mobile emitter has some serious batteries or something
EDIT
Barclay pisses me off, as well. I really don't like the Barclay episodes. The First one was cool, cause it was like 'neat, old characters'. Now it is just plain old.
What I really want to see is more interaction with the Borg rebellion.
EDIT 2: Barclay is spelled 'Barclay', not 'Barkley'. DOH