The Atom [Adam Thompson] (third Atom); The Atom [Arthur Harrison Thompson] (first Atom); The Atom (second Atom) (in flashback); Sam Schwartz (President of the United States); Marcus Moore (behind the scenes); Nightwing (behind the scenes); Fatale Five [Ice; Shadow Thief; Kid Psycho; Deathstroke; Count Viper] (cameo); The Joker [Mary Marvel] (TV screen cameo)
Synopsis
The Atom avenges his father's death and goes public.