Bud Abbott

Bud Alexander

Lou Costello

Lou Francis

Nancy Guild

Helen Gray

Arthur Franz

Tommy Nelson

Adele Jergens

Boots Marsden

Sheldon Leonard

Boots Morgan

William Frawley

Det. Roberts

Gavin Muir

Dr. Philip Gray

Sam Balter

Radio Announcer

John Daheim

Rocky Hanlon

Walter F. Appler

Professor Dugan (uncredited)

Bobby Barber

Sneaky (uncredited)

Howard Banks

Officer (uncredited)

Richard Bartell

Bald Man (uncredited)

Phil Bloom

Fight Spectator (uncredited)

John Breen

Trainer (uncredited)

Milt Bronson

Ring Announcer (uncredited)

Ralph Brooks

Man at Bar (uncredited)

Steve Carruthers

Reporter (uncredited)

Tom Coleman

Dugan Detective School Graduate (uncredited)