Gaslight

This classic Victorian thriller was first produced in 1935. Jack Manningham is slowly, deliberately driving his wife, Bella, insane. He has almost succeeded when help arrives in the form of a former detective, Rough, who believes Manningham to be a thief and murderer. Aided by Bella, Rough proves Manningham's true identity and finally Bella achieves a few moments of sweet revenge for the suffering inflicted on her.