The Devil Commands (1941)
Dr. Julian Blair: Anne dear, your mother is not dead, not really. She's come back to me!
Dr. Van Den: I know one thing, Julian - there are things human beings have no right to know!
Anne Blair: They say my father's spirit must still lives in that house. I don't know. When he seemed to be so close to what he sought, something reached for him - a warning that human beings must not try to reach beyond death! I don't know. No one will ever know, and yet perhaps the time will come when the door to infinity will open... perhaps... perhaps...