Babylon 5 - Sleeping in the Light Is that the episode where Sheridan is sitting in space all by himself, and then he's gone?
For me, Babylon 5 was the best sci-fi show to date.
Dittos on B5 as the best SF show to date, and although many excellent options,
Sleeping in the Light made a great finale to a great series. All the greater for having been shot at the end of the 4th season when it wasn't sure the desired five year run would happen. It ended up airing after a 5th season and still tied things up perfectly.
Loved Les and the Turkeys, but I also think Archie and the Meathead's 'Sock and Shoe' episode is deserving.