Lou Costello
Mervin Q. Milgrim
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
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)
