I am considering buying the animated series collector's DVD boxset. I have only watched a couple of the first episodes in season one. I really liked it alot, my only concern is Robin/Batgirl. I hate "sidekicks", so my question is this, once Robin & Batgirl are introduced into the show are they in every single episode? I don't wanna waste the money on the DVD set if they are. Thanks for the help in advance, pdm