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