Valley of the Zombies, 1946

Ormand Murks, thought dead but survives via means of a voodoo potion, has an insatiable need for blood. Murks kills Dr. Maynard, the doctor responsible for  committing him to an insane asylum. Meanwhile two young lovers are suspected of the murders and are out to prove their innocence. Though this doesn’t have much in the way of valleys or zombies, it is a fun little flick with pretty good acting and dialog.
“You might need my help, and I’m good at screaming.” – Susan