User blog comment:BeholdtheVision/Really Would Appreciate Help With This.../@comment-1038387-20120820121754/@comment-1038387-20120820131739

On the season one disc, he only appeared in "Christmas with the Joker" (which you've seen), and then two episodes on disc four, "Fear of Victory" and "Dreams in Darkness". Robin was in college at the time, and they didn't use him too much because they wanted to do gritty loner Batman. When the show moved to Fox, those meddling executives wanted more Robin for the younger audiences.

BTAS has a lot of episodes, and you don't have to see every one. Since you've finished disc 2, you've seen the trainwreck "I've got Batman in my basement". On disc three, "See No Evil" and "Prophecy of Doom" are the worst. Disc four are all pretty good.