The episode that get me interested in B5 was Mind War, specificly when Iron Heart "evolve". But I really became a fan of the show when I saw Kosh flying as an angel while rescuing Sheridian. After that my quest to know more about the First Ones became obsesive and keep me watching every single episode and reading every single piece of information related to them. Not because of chaos or order but because the sole idea of sentient beings millions of years older than us was amazing. When the shadow war was over and they went beyond the rim I feel... "empty" as if they forget and left me, alone, taking with them my passion and drive for the show. The show was never the same for me after that. Of course I keep watching it but I really miss them and I hope to see them again some time in the future and to know more about them to know their history, to know how it feels to walk trough the stars like gigants!!!