Leo Gorcey (Slip Mahoney)
Huntz Hall (Sach Debussy Jones)
Glenn Strange (Atlas)
Gabriel Dell (Gabe Moreno)
Alan Napier (Dr. Druzik)
Harry Tyler (Constable Isaih Hoskins)
Kit Guard (Benny)
Stanley Blystone (Henchman)
Anna Chandler (Woman)
David Gorcey (Chuck)
Skelton Knaggs (Hugo)
William Yetter, Jr. (Otto)
Minerva Urecal (Mrs. Hoskins)
Chester Clute (Mike Barton)
Pat Goldin (Father)
Robert Coogan (Young Man)
Jane Adams (Nancy Marlowe)
William Benedict (Whitey)
Bernard Gorcey (Louie Dumbrowsky)
Bennie Bartlett (Butch)