The novelty of a new superhero wore off pretty fast with the Atom because after just three episodes, I feel like I have had enough. All three were essentially the exact same story. The Atom shrunk down, fiddled with some machine parts, defeated the enemies, and then pretty much admitted to his friends that he was the Atom, only they didn't believe someone as incompetent as he could have saved them. Its worth watching one of these just to see the Atom in action, even if its a little unbelievable that a miniature guy's punches or flying head-butts would actually hurt. If I had to pick one, I would say the best was the first because the Atom assumed many sizes throughout and the villains were also small for part of the time making his shrinking a useful tactic, well at least as useful as just stepping on them.
Invasion of the Beetle-Men