The Man They Could Not Hang is a 1939 American horror film directed by Nick Grinde from a screenplay by Karl Brown. It stars Boris Karloff as Dr. Henryk Savaard, a scientist who develops a procedure for bringing the dead back to life. When he is arrested and sentenced to be executed for murdering a young medical student who volunteered to be killed to test the procedure, Savaard vows retribution on the individuals responsible. Alongside Karloff, the film's cast includes Lorna Gray, Robert Wilcox, and Roger Pryor.

Nick Grinde was an American film director and screenwriter. He directed 57 films between 1928 and 1945.