The Twilight Zone (1959)

S3E33 The Dummy

A ventriloquist becomes increasingly convinced that his dummy, Willie, is both sentient and malevolent. As he schemes to create a new act featuring a different dummy, Willie makes it clear that he disapproves of the idea. Tensions rise as the ventriloquist navigates his growing unease about Willie’s true nature and his desire to break free from the puppet's influence.