Black Friday (1940)

Approved  |   |  Drama, Horror, Sci-Fi  |  12 April 1940 (USA)
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Ratings: 6.3/10 from 1,169 users  
Reviews: 42 user | 23 critic

Dr. Sovac transplants the brain of a gangster into his professor friend's body to save his life, but there is a side effect that causes a dangerous split personality.



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Complete credited cast:
Stanley Ridges ...
Anne Nagel ...
Anne Gwynne ...
Jean Sovac
Virginia Brissac ...
Mrs. Margaret Kingsley
Edmund MacDonald ...
Frank Miller
William Kane
Murray Alper ...
Joe King ...
Chief of Police
John Kelly ...
Taxi Driver
Robert Morgan ...
Hotel Associate


When his friend Professor Kingsley is at deaths door, brain surgeon Dr. Sovac saves his life by means of an illegal operation that transplants part of injured gangster Red Cannon's brain. Unfortunately, the operation has a disastrous Jeckll and Hyde side effect and under certain conditions the persona of Cannon emerges. Sovac soon learns of the duel personality and of half a million dollars the gangster has hidden away. He attempts to find the money through the manipulation of his friend, an attempt that brings Kingsley closer to madness as he alternates between a meek professor of English and a brutal gangster out for murderous revenge on those who tried to kill him. Written by Carlos Valverde <>

Plot Summary | Add Synopsis


A Reign Of HORROR... a man-made monster on the loose!


Drama | Horror | Sci-Fi | Crime


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Release Date:

12 April 1940 (USA)  »

Also Known As:

Friday the Thirteenth  »

Box Office


$125,750 (estimated)

Company Credits

Production Co:

Show detailed on  »

Technical Specs


Sound Mix:

(Western Electric Mirrophonic Recording)

Aspect Ratio:

1.37 : 1
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Did You Know?


Professor Kingsley slightly misquotes William Cowper's line from "The Progress of Error," "How much a dunce that has been sent to roam excels a dunce that has been kept at home." Kingsley sadly cites to his students, "'How many the dunce that has been sent to Rome excels the dunce that must stay at home.'" Perhaps this to conform the idea to his situation. See more »


Featured in Lugosi: The Forgotten King (1985) See more »

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User Reviews

Karloff and Lugosi NOT together
22 February 2001 | by (Crossing the street heh heh) – See all my reviews

Okay when I sat down to watch this film the other night it was with dread.All I had ever heard was how this wasn't a horror movie and it was a cheat because Lugosi & Karloff didn't have any scenes together.

Guess what?It was a darn fine movie.This falls more into a gangster/mad scientist type of genre but is a lot of fun just the same. Stanley Ridges actually steals the movie with his performance as the teacher/gangster.Karloff is his usual wonderful self.Lugosi does a great job in the allegedly thankless role of Varney the gangster.

Rather than go into the details of this little gem why don't you see if you can find a copy of it and watch it.

15 of 17 people found this review helpful.  Was this review helpful to you?

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