Invisible Ghost (1941)

A fine performance from Bela Lugosi in a sort of "Jeykll and Hyde" role as a respectable man by day but a killer at night - driven by the hypnotic effects of seeing his dead wife back from the grave. The storyline is pretty tosh; and but for Clarence Muse as "Evans" the butler, the supporting cast probably all deserved to be murdered. It's a tiny-budget, poorly lit vehicle for the star, but worth it for him and it's only just over an hour.