Leo Gorcey ( Leo Gorcey )

Terence 'Slip' Mahoney

Huntz Hall ( Huntz Hall )

Horace Debussy 'Satch' Jones

Nestor Paiva ( Nestor Paiva )

Tony 'Piggy' Locarno

Frankie Darro ( Frankie Darro )

Cousin Jimmy

Gabriel Dell ( Gabriel Dell )

Ricky Moreno

Rosemary La Planche ( Rosemary La Planche )

Daisy Harris

David Gorcey ( David Gorcey )

Chuck

William Benedict ( William Benedict )

Whitey

Nelson Leigh ( Nelson Leigh )

Fr. O'Hanlon

Mary Gordon ( Mary Gordon )

Mrs. Mamie Mahoney

Dewey Robinson ( Dewey Robinson )

Henchman 'Moose'

Dick Paxton ( Dick Paxton )

Henchman 'Jockey'

Thomas Menzies ( Thomas Menzies )

'Boomer', a boy

Geneva Gray ( Geneva Gray )

Josie, his big sister

Buddy Gorman ( Buddy Gorman )

Andrew T. 'Andy' Miller

Benny Bartlett ( Benny Bartlett )

Harry 'Jag' Harmon

John Eldredge ( John Eldredge )

Asst. Dist. Atty. John Willis

Robert Emmett Keane ( Robert Emmett Keane )

Lawyer Felix Crowe

Tom Coleman ( Tom Coleman )

Warehouse Watchman

John Elliott ( John Elliott )

The Judge

Wilbur Mack ( Wilbur Mack )

Transfusion Doctor

Wade Crosby ( Wade Crosby )

Henchman-Mechanic Mike

Meyer Grace ( Meyer Grace )

White-capped Mechanic-Henchman

Mike Donovan ( Mike Donovan )