Who Done It?

Bud Abbott

Chick Larkin

Lou Costello

Mervin Q. Milgrim

Patric Knowles

Jim Turner

Louise Allbritton

Jane Little

Mary Wickes

Juliet Collins

William Gargan

Detective Inspector Lou

William Bendix

Detective Sgt. Brannigan

Thomas Gomez

Col. J.R. Andrews

Ludwig Stössel

Dr. Anton Marek

Edmund MacDonald

'Murder at Midnight' Announcer

Jerome Cowan

Heller

Walter Tetley

'Shorty', a studio pageboy

Joe Kirk

Harry, 'Murder At Midnight' sound man

Don Porter

'Murder at Midnight' program manager

Norman Abbott

'Murder at Midnight' Organist

Abel Pina

Acrobat (uncredited)

Antonio Pina

Acrobat (uncredited)

Henry Pina

Acrobat (uncredited)

Jerry Pina

Acrobat (uncredited)

Jenaro Pina

Acrobat (uncredited)

Milton Parsons

Coroner (cameo)

Gladys Blake

Telephone Operator

Eddie Bruce

Bill, man telephoning Brazil

Billy Wayne

Jake, man telephoning Alaska

Alice Fleming

Mrs. Laffingwell, dowager telephoning Moscow

Margaret Brayton

Radio Actress (uncredited)

Crane Whitley

Radio Actor (uncredited)

Paul Dubov

Radio Actor (uncredited)

Gene O'Donnell

Radio Actor (uncredited)

Ed Emerson

Announcer (uncredited)

Buddy Twiss

Announcer (uncredited)

Edward Keane

Man in drug store touting Juliet (uncredited)

Joseph La Cava

Station Employee (uncredited)

George Ford

Station Employee (uncredited)

Jerry Frank

Customer (uncredited)

Duke York

Attendant with the Coroner (uncredited)

Harry Strang

Truck Driver (uncredited)

Bobby Barber

Test Technician in Booth (uncredited)

Chuck Hamilton

Policeman (uncredited)

Frank McLure

Acrobatic Show Spectator (uncredited)

Frank Penny

Spinelli (uncredited)