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)

Edward J. Kay

Music Director

Bert Lawrence

Dialogue

Marcel Le Picard

Director of Photography

Wesley Barry

Assistant Director

Mary Chaffee

Continuity

Jan Grippo

Producer

William Austin

Editor

Tom Lambert

Sound

Dave Milton

Art Direction

Raymond Boltz Jr.

Set Decoration

Allen K. Wood

Production Manager

William Beaudine

Director

Bert Lawrence

Additional Dialogue

Charles R. Marion

Screenplay