Leo Gorcey

Terence Aloysius 'Slip' Mahoney

Huntz Hall

Horace Debussy 'Sach' Jones

Bobby Jordan

Bobby

William Benedict

Whitey

David Gorcey

Chuck

Teala Loring

Cathy Smith

Sheldon Leonard

Ace Deuce Baker

Daun Kennedy

Maizie (as Dawn Kennedy)

James Burke

Detective O'Malley

Vince Barnett

Street Cleaner

William 'Wee Willie' Davis

Moose McCall (as Wee Willie Davis)

William Ruhl

Henchman Spike

Emmett Vogan

Mr. Johnson

Bernard Gorcey

Louie Dumbrowsky

Milton Parsons

Professor Schnackenberger

Lester Dorr

Feather-Fingers

William Newell

Detective Dugan

Eddie Dunn

Police Officer O'Hara