Demons of the Mind/Fun Facts
From The Grindhouse Cinema Database
- Robert Hardy replaced Eric Porter who withdrew from the movie to film Hands of the Ripper (1971) which was made simultaneously.
- Gillian Hills was a last-minute replacement for a big name who dropped out.
- The role of Elisabeth was originally intended for famous pop icon Marianne Faithfull.
- Although the movie was completed in 1971, it sat on a shelf for over a year and was finally released on a double bill with the trashy psycho feature Tower of Evil (1972).
- The role of Baron Zorn was originally offered to Paul Scofield and James Mason, both of whom turned it down.
- Shane Briant made his film debut as the tormented Emil.