Captain America [Steve Rogers]; Bucky Barnes Robot (origin, dies); SHIELD [Sharon Carter; Nick Fury; Dum Dum Dugan; Jasper Sitwell (cameo)]; Falcon [Sam Wilson]; Redwing; Modok (villain); AIM (villains); Dr. Doom (flashback, villain); Batroc (cameo flashback, villain); Porcupine (cameo flashback, villain); Whirlwind (cameo flashback, villain); Baron Strucker Robot (cameo, villain); Walter Cronkite (cameo); Professor Paul Fosgrave (cameo flashback); Grizzly [Agent R-1] (cameo flashback, villain); Agent R-2 (cameo flashback, villain); Mart Baker (cameo flashback)
Captain America and the public at large believe Bucky Barnes has returned. It is revealed that Modok had Dr. Doom create a robot duplicate of Bucky. Modok makes Bucky attack Captain America. But the robot is unable to kill Cap leading Modok to destroy it.