Black Friday

University professor George Kingsley is struck by gangsters while crossing the street, leaving him with brain damage and one of the gangsters, Cannon, paralyzed. Kingsley's friend Dr. Sovac attends to both men, and when Cannon offers him a reward for aiding his recovery, Kovac transplants part of Cannon's brain into the dying Kingsley's skull, creating a dual personality.

• 
  Stanley Ridges

  Prof. George Kingsley / Red Cannon
• 
  Boris Karloff

  Dr. Ernest Sovac
• 
  Bela Lugosi

  Eric Marnay
• 
  Anne Nagel

  Sunny Rogers
• 
  Anne Gwynne

  Jean Sovac
• 
  Virginia Brissac

  Mrs. Margaret Kingsley
• 
  Edmund MacDonald

  Frank Miller
• 
  Paul Fix

  William Kane
• 
  Murray Alper

  Bellhop
• 
  Jack Mulhall

  Bartender