Didn't have anything to do with an anniversary (which I wasn't really aware of until now), but I re-watched "The Long Night"/"Into the Fire" from B5's Season 4 the day before yesterday.
Great for the Londo/Vir/G'Kar/Cartagia/Morden stuff.
I noticed something new and particularly odd though: The rather jolly
way Sheridan says "Mr. Lennier, take us into the fire!" Sheridan really liked blowing shit up, didn't he? B5's resident pyromaniac.