Finally! The Exorcist gets mentioned in Season 4. Robin and Nancy, investigating Victor—imprisoned in a psychiatric hospital for murdering his family—discover through old newspapers that he once requested an exorcism. Movie buff Robin naturally recalls The Exorcist. The Season 2 climax, where possessed Will is saved from the Mind Flayer, is a perfect homage to The Exorcist—aggressive Will threatening his mother, Will strapped to a bed as the demon is driven out.