Boris Karloff in production still for "Black Friday"
Boris Karloff in production still for "Black Friday"

Brains on Ice! week concludes at Trailers from Hell with director and TFH creator Joe Dante introducing 1940 Boris Karloff starrer "Black Friday." 

More brain games from screenwriter Curt Siodmak, this time involving Boris Karloff as an ethically-challenged scientist who transfers the grey matter of a brutal gangster into the skull of timid professor Stanley Ridges. Karloff and Lugosi are top-billed but the velvet-toned Ridges, an underrated vet who refined his craft on the English stage, turns in a memorable dual-edged performance as the gentle soul who suffers through a series of Hyde-like transformations.