The AV Club has an occasional series that gives the ten most representative episodes of a series. It's just done Babylon 5. The theory is that this is an important if forgotten show since it helped bring on the age of serialization of drama we're still living in. Earlier sf shows had general arcs but each episode was meant to be taken on its own.
Unfortunately, not having watched in so long, it's hard for me to judge if their ten episodes represent the show well. I do wonder why four of them are from season two. I suppose it might be highly represented in that so many important revelations occured, but I seem to recall season three was the height of the show.
PS One of the quirks of Sheldon Cooper--of The Big Bang Theory--is he hates Babylon 5. I've always wonder how the producers decided to give him that trait. Is it personal?