Justice League Unlimited — Season 1, Episode 10: Dark Heart
Animation, Action & Adventure, Sci-Fi & Fantasy • 23 min • 3 seasons, 39 episodes • ★ 8.3/10
Episode synopsis
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.
About Justice League Unlimited
The galaxy's most powerful superheroes return to battle the allied villains and criminal plots that endanger the universe.