Fabio
Inspector Weil
Sir Reginald Hoover / Argoman
Lord Carter
Mars
Martin Stevens
Martin Stevens / Superseven
Johnny Quick
Rex Monroe
Glaucus Valerius
Glenn Forest
Clint Lomas
Marcus
Valerio
Sergente O'Hirt
Ortag
Michael King
US Army Captain (uncredited)
Marcus Aulus
Douglas Gordon
State Attorney
Harry Brakson
Commander King
(uncredited)
The Senator
Drake
Creepy Old Man
Extra
Hendricks