Bud Abbott

Bud Alexander

Lou Costello

Lou Francis

Nancy Guild

Helen Gray

Arthur Franz

Tommy Nelson

Adele Jergens

Boots Marsden

Sheldon Leonard

Boots Morgan

William Frawley

Det. Roberts

Gavin Muir

Dr. Philip Gray

John Daheim

Rocky Hanlon

Bobby Barber

Sneaky (uncredited)

Steve Carruthers

Reporter (uncredited)

Chester Conklin

Counter Man (uncredited)

Russ Conway

Newspaperman (uncredited)

Frank Dae

Col. Duffie (uncredited)

Sayre Dearing

Reporter (uncredited)

Jimmy Dime

Man in Gym (uncredited)

Ralph Dunn

Motorcycle Cop (uncredited)

Edward Gargan

Milt (uncredited)

Harold Goodwin

Bartender (uncredited)

Kit Guard

Fighter on Rowing Machine (uncredited)

Chuck Hamilton

Policeman (uncredited)

Stuart Holmes

Fight Spectator (uncredited)

Kenner G. Kemp

Policeman (uncredited)

Donald Kerr

Fight Spectator (uncredited)

George J. Lewis

Torpedo Al (uncredited)

Rory Mallinson

Tough Guy in Bar (uncredited)

Paul Maxey

Dr. Turner (uncredited)

Mathew McCue

Graduation Spectator (uncredited)

William H. O'Brien

Fight Spectator (uncredited)

Monty O'Grady

Fight Spectator (uncredited)

Jack Perrin

Dugan Detective School Graduate (uncredited)

Jack Perry

Rocky's Handler (uncredited)

Syd Saylor

Waiter (uncredited)

Carl Sklover

Lou's Handler (uncredited)

Herb Vigran

Stillwell (uncredited)

Billy Wayne

Rooney - Rocky's Manager (uncredited)