aka Secret Killer, Gatti rossi in un labirinto di vetro
Director: Umberto Lenzi
A maniac killer in a red cape and gloves is killing off American tourists by gouging out their eyeballs.
- George Rigaud [Reverend Bronson]
- Martine Brochard [Paulette Stone]
- Olga Montes [Peggy Randall]
- Laura Trotter [Murder Victim at Castle]
- In addition to the above death scenes, there are two more female death scenes. However, both actresses are uncredited; they are not listed in the credits of the film itself or on IMDb.
- One victim is a woman named "Pepeta". The other is an unnamed servant girl.
- Both women are killed by being stabbed in the left eye.