- Bud Abbott
- Chick Larkin / Voice of Himself on Radio
- Lou Costello
- Mervin Q. Milgrim / Voice of Himself on Radio
- Patric Knowles
- Jimmy Turner
- William Gargan
- Police Lt. Lou Moran
- Louise Allbritton
- Jane Little
- Thomas Gomez
- Col. J.R. Andrews
- William Bendix
- Detective Brannigan
- Don Porter
- Art Fraser
- Jerome Cowan
- Marco Heller
- Mary Wickes
- Juliet Collins
- Ludwig Stössel
- Dr. Anton Marek
- Norman Abbott
- Organist
- Bobby Barber
- Test Technician in Booth
- Gladys Blake
- Telephone Operator
- Margaret Brayton
- Radio Actress
- Eddie Bruce
- Man Telephoning Brazil
- Paul Dubov
- Radio Actor
- Ed Emerson
- Announcer
- Alice Fleming
- Mrs. Laffingwell Telephoning Moscow
- George Ford
- Station Employee
- Jerry Frank
- Customer
- Chuck Hamilton
- Policeman
- Edward Keane
- Carter
- Joe Kirk
- Harry - the Radio Technician
- Joseph La Cava
- Station Employee
- Edmund MacDonald
- 'Murder at Midnight' Announcer
- Frank McLure
- Acrobatic Show Spectator
- Gene O'Donnell
- Radio Actor
- Milton Parsons
- Coroner
- Frank Penny
- Spinelli
- The Pina Troupe
- Acrobats
- Abel Pina
- Acrobat
- Antonio Pina
- Acrobat
- Henry Pina
- Acrobat
- Jenaro Pina
- Acrobat
- Jerry Pina
- Acrobat
- Ronald R. Rondell
- Station Employee
- Harry Strang
- Truck Driver
- Walter Tetley
- Elevator Operator
- Buddy Twiss
- Announcer
- Billy Wayne
- Jake - Telephoner to Alaska
- Crane Whitley
- Radio Actor
- Duke York
- Attendant with the Coroner
- Katherine Yorke
- Lady in the audience
