CharacterRobotman (Cliff Steele), Beast Boy (Gar Logan) (intro, later the Changeling), Marie Logan (Beast Boy's mother, flashback, death), Elasti-Girl (Rita Farr), Monsieur Mallah), Mr. 103 (villain), Mr. Moore (private investigator), Mr. Glenn, Mark Logan (Beast Boy's father, flashback, death), Dr. Duroff, Drabny, Mr. 103 (John Dubrovny) (villain), Dr. Weir (also as Durling) (villain), Abu Hallam (Monsieur Mallah) (villain), Ultimax (villain), Mr. Takashu, Jill, Lord Brisbane, General Immortus, Mr. Pike, King Dax, Dodge, Hogan (actor), Beast Boy (Gar Logan) (cameo), Brotherhood of Evil (Brain, Doom Patrol (Elasti-Girl (Rita Farr), Robotman (Cliff Steele)), Volcano Man, Brotherhood of Evil (The Brain, Poor Mary, Kal-El) (cameo)), Wonder Woman (Diana Prince) (cameo), Helen Steele (Randy's wife), The Brain), General Immortus), Nao Tsi, Super-Hip (cameo), Dr. Drew (aka Dr. Death) (villain), Volcano Man), Richard Morgan, Elasti-Girl, Beast Boy (Gar Logan) (origin), Randy Steele (Cliff's brother), Sears, Waja the Wise, Mr. Z, Murdoch (actor), Monsieur Mallah, The Meteor Man, Bug Man (villain), Wonder Girl (Donna Troy) (cameo)), Rocky Davis) (cameo), Blind Mike, Madame Rouge, Negative Man (Larry Trainor), Kranus (villain), Garguax, Prof Haley, Mr. Z (villain), Manuel, Balu Sutra, Lefevre, Flash (Barry Allen) (Cameo), the Doom Patrol (Elasti-Girl (Rita Farr), Negative Man (Larry Trainor) (origin), Joe, President Lyndon B. Johnson, Robin (Dick Grayson) (cameo), the One-Eyed King, The Chief (Niles Caulder), Red Ryan, Negative Man, Mr. Nicholas Galtry (Beast Boy's guardian, intro), Nicholas Galtry (Beast Boy's guardian), Multi-Woman), Mr. 103 (Jon Dubrovny) (intro, villain), Dr. Friedrich Kleinmann, Beast Boy (Gar Logan), Mrs. Trainor (Larry's mother), Tibor, Challenger-Haters (Kra, Mr. Stanhope, Chief, "Killer" Keller (villain), Osmun, Mento (Steve Dayton), Nicholas Galtry (villain), Robotman (Cliff Steele)) (brief origin), Bug Man, Teen Titans (Kid Flash (Wally West) (cameo), Multi-Woman, General Immortus (villain), Superman (Clark Kent), Brotherhood of Evil (Madame Rouge, Meteor Man (Professor Randolph Ormsby) (villain), Madame Rogue, Justice League of America (Batman (Bruce Wayne) (cameo), Doom Patrol (Chief, Herman, Dave Lannen, Nicholas Galtry, Robotman), Multi-Man, Lieutenant Briar, Rocky Davis), the Doom Patrol (The Chief (Niles Caulder), King Zatopa, McConnell, Robotman (Cliff Steele) (origin), Leroy, Flash (Barry Allen)
Superhero TeamChallengers of the Unknown