Bud Abbott
Bud Alexander
Boxer Tommy Nelson is accused of killing his manager. While detectives Bud and Lou investigate, they come across an invisibility formula with which Tommy injects himself rather than face the police. This sparks an idea for trapping gangster Morgan by having Lou fight champ Rocky Hanlon, with Tommy's invisible help.
Bud Alexander
Lou Francis
Helen Gray
Tommy Nelson
Boots Marsden
Boots Morgan
Det. Roberts
Dr. Philip Gray
Radio Announcer
Rocky Hanlon
Professor Dugan (uncredited)
Sneaky (uncredited)
Officer (uncredited)
Bald Man (uncredited)
Fight Spectator (uncredited)
Trainer (uncredited)
Ring Announcer (uncredited)
Man at Bar (uncredited)
Reporter (uncredited)
Dugan Detective School Graduate (uncredited)
Director
