Non-mad scientists work to foil the diabolical The Bat who builds a humanoid robot to fight the Aztec mummy so he can steal some cursed Aztec treasure.
Three Stooges meet an intelligent robot on Venus.
James Stewart questions the nature of reality and has a clinical break. Also great locations in SF, which is important in cognitive science.
The classic giant-floating-evil-brain flick.

A supercomputer turns a mischievous child into a genious, so that he may carry-out the computer's plans for world domination.

A highly-intelligent alien race has been eradicated, leaving only its technology behind.

A woman is taken hostage by a gang of drug smugglers and subjected to a machine that reads brain waves and turns its subjects psychotic.
A scientist extracts a dead bad-guy's brain for research, but the brain begins to take control of the scientist.

Kameda is afflicted with a seizure disorder that leaves him in a state of beatific innocence. Kurosawa adaptation of the Dostoyevsky novel.

Young sociopathic murderers struggle to appear "normal," but have difficulty with the apparently suggestive behavior of those around them.

A woman finds herself in an insane asylum and cannot remember how she got there. Notable for raising public awareness about the state of mental institutions.

A psychoanalyst protects the identity of a dissociative amnesia patient accused of murder while attempting to recover his memory

Charles Boyer tries to implant false memories in Ingrid Bergman.
Ludwig Frankenstein (the other son of Baron von Frankenstein) decides to cure the monster (Lon Chaney Jr) by doing a brain transplant with Ygor (Bela Lugosi).
Boris Karloff is a neurosurgeon wrongly imprisoned for treason. He is asked to perform surgery on the corrupt warden's daughter.
A scientist has trouble investigating the origins of the mind and the soul.