Hard Boiled Mahoney

Leo Gorcey

Terence Aloysius 'Slip' Mahoney

Huntz Hall

Horace Debussy 'Sach' Jones

Betty Compson

Selena Webster

Gabriel Dell

Gabe

Teala Loring

Eleanor Williams

William Benedict

Whitey

Bobby Jordan

Bobby

David Gorcey

Chuck

Bernard Gorcey

Louie

Dan Seymour

Dr. Armand

Byron Foulger

Prof. Quizard

Patti Brill

Alice

Pierre Watkin

Dr. Rolfe Carter

Danny Beck

Lennie the Meatball

Carmen D'Antonio

Receptionist

Noble Johnson

Hasson / Richard

William Ruhl

McGregor - Apartment Manager

Louis Faust

Tom Williams (uncredited)