The Head of Janus (1920) is a Horror, Drama film that follows two opposing characters are hidden in the person of the inconspicuous London gentleman Dr. Warren and Janus. Lost film. The Head of Janus is not currently listed with streaming providers in your selected region, but availability can change over time. It has a user rating of 9.0 out of 10 from 1 votes. Fans of horror movies may also want to explore similar titles below.