Philip Vernon is presented as a possible identity of the man who appears in a photograph or film connected with the investigation. The identification is uncertain: the events indicate that only Bonaiuti and Serafian can identify the man with certainty. His possible connection to the protected figure makes him relevant to Franco's search, but the available events do not confirm his role.
Kaiser is Martha's friend and colleague from the library, whom she had trained. When Martha runs away from Helmut, Kaiser agrees to drive her away, but her paranoia makes her believe the following car contains Helmut. She grabs the wheel, causing a crash in which Kaiser dies.
Raoul is Viola's friend and later her husband. He leaves when he believes he cannot give her the life she wants, and afterward receives her letters about her illness and death. Three years later, he returns for the reading of her will, disputes Isidor's insistence on fulfilling its demand, and refuses to mutilate Viola's remains.
Peter Chatel has 37 screen credits in a career dating back to 1966. Signature works include Il momento dell'avventura, Die Erzählungen Bjelkins, Hinzelmeier. Explore the interactive character relationship maps on each title page to trace how their roles connect across franchises.