Fear in the Night is a 1947 American low budget black-and-white film noir mystery film directed by Maxwell Shane and starring Paul Kelly and DeForest Kelley (in his film debut). It is based on the Cornell Woolrich story "And So to Death" (retitled '"Nightmare" in 1943). Woolrich is credited under pen name William Irish. The film was remade by the same director in 1956 with the title Nightmare this time starring Edward G. Robinson playing the cop and Kevin McCarthy.
(Summary from Wikipedia)
Copyright Info: This movie is in the public domain and is legally available for free on YouTube.