Murders In The Rue Morgue (1932)

A mad scientist (Bela Lugosi) and his intelligent gorilla are part of a traveling circus in 19th century Paris. The doctor is doing experiments on young women by injecting them with gorilla blood in the hopes of creating a super-intelligent ape/human hybrid. However, the experiments always seem to fail, killing the innocent victims.

Directed by Robert Florey, this film has lots of shocking imagery that is still powerful today.

Available: Netflix, Amazon