Bud Abbott

as Chick Larkin

Lou Costello

as Mervin Q. Milgrim

Patric Knowles

as Jim Turner

Louise Allbritton

as Jane Little

Mary Wickes

as Juliet Collins

William Gargan

as Detective Inspector Lou

William Bendix

as Detective Sgt. Brannigan

Thomas Gomez

as Col. J.R. Andrews

Ludwig Stössel

as Dr. Anton Marek

Edmund MacDonald

as 'Murder at Midnight' Announcer

Jerome Cowan

as Heller

Walter Tetley

as 'Shorty', a studio pageboy

Joe Kirk

as Harry, 'Murder At Midnight' sound man

Don Porter

as 'Murder at Midnight' program manager

Norman Abbott

as 'Murder at Midnight' Organist

Abel Pina

as Acrobat (uncredited)

Antonio Pina

as Acrobat (uncredited)

Henry Pina

as Acrobat (uncredited)

Jerry Pina

as Acrobat (uncredited)

Jenaro Pina

as Acrobat (uncredited)

Milton Parsons

as Coroner (cameo)

Gladys Blake

as Telephone Operator

Eddie Bruce

as Bill, man telephoning Brazil

Billy Wayne

as Jake, man telephoning Alaska

Alice Fleming

as Mrs. Laffingwell, dowager telephoning Moscow

Margaret Brayton

as Radio Actress (uncredited)

Crane Whitley

as Radio Actor (uncredited)

Paul Dubov

as Radio Actor (uncredited)

Gene O'Donnell

as Radio Actor (uncredited)

Ed Emerson

as Announcer (uncredited)

Buddy Twiss

as Announcer (uncredited)

Edward Keane

as Man in drug store touting Juliet (uncredited)

Joseph La Cava

as Station Employee (uncredited)

George Ford

as Station Employee (uncredited)

Jerry Frank

as Customer (uncredited)

Duke York

as Attendant with the Coroner (uncredited)

Harry Strang

as Truck Driver (uncredited)

Bobby Barber

as Test Technician in Booth (uncredited)

Chuck Hamilton

as Policeman (uncredited)

Frank McLure

as Acrobatic Show Spectator (uncredited)

Frank Penny

as Spinelli (uncredited)