Fan Casting Herr Knock in Nosferatu: A Symphony of Horror

Knock is Orlok's servant, almost like a butler to the Count. On top of that, he is also a well-known criminal throughout Germany, and is ratted out by Thomas Hutter at the start of the film. Eventually, Professor Von Franz interrogates him for information, but as Knock is revealing things to the Professor, he is the first to die by Orlok's hands, courtesy of his powers in telepathy.