Night Key

Night Key is a science fiction crime film starring Boris Karloff and released by Universal Pictures in 1937.

Filming began on January 18, 1937 with a budget of 175,000. Filming ended on either Februaryor February 20,days over schedule and 17,000 over budget.This film, along with Tower of London, The Climax, The Strange Door and The Black Castle, was released on DVD in 2006 by Universal Studios as part of The Boris Karloff Collection. ........

Source: Wikipedia