3 Season
39 Episode
Justice League Unlimited - Season 1 Episode 10 Dark Heart
Most of the League battles with powerful alien nanotechnology but, realize that the waves of self-replicating robots cannot be simply destroyed. The diminutive Atom shrinks himself to stop the robots from the inside.
- Year: 2006
- Country: United States of America
- Genre: Animation, Action & Adventure, Sci-Fi & Fantasy, Kids
- Studio: Cartoon Network
- Keyword: based on comic, superhero team
- Director:
- Cast: Kevin Conroy, George Newbern, Susan Eisenberg, Carl Lumbly, Phil LaMarr