Leo Gorcey
Terence Aloysius 'Slip' Mahoney
Huntz Hall
Horace Debussy 'Sach' Jones
Lloyd Corrigan
Edgar Alden Franklin Smith
Lela Bliss
Margo
Philip Van Zandt
Dr. Basil Granville
Bernard Gorcey
Louie
William Benedict
Whitey
Buddy Gorman
Butch
David Gorcey
Chuck
Jan Kayne
Cynthia
Argentina Brunetti
Mrs. Parelli
Marshall Bradford
Professor Krantz
Robert Coogan
Jack Eagan
Michael Ross
Gus
Bess Flowers
Seance Guest (uncredited)