Fritz Lang

 was the director of Metropolis and someone the Ninth Doctor idolised. He didn't believe the Doctor when the Doctor told him that his puppet was a Cyberman. Because of this he chucked the Doctor of his set. He didn't like working with Olaf Richter. He had a short temper. Dieter Jovanovic tried to get the cyberman to kill him. He was annoyed that he couldn't use the cyberman and reverted to his original plan. (AUDIO: Monsters in Metropolis)