Dick Purcell
Captain America / Grant Gardner
Lorna Gray
Gail Richards
Lionel Atwill
Cyrus Maldor
Charles Trowbridge
Police Commissioner Dryden
Russell Hicks
Mayor Randolph
George J. Lewis
Bart Matson
Adventure
Action
Science Fiction
Captain America
Superhero Captain America battles the evil forces of the archvillain called The Scarab, who poisons his enemies and steals a secret device capable of destroying buildings by sound vibrations.
