Crabtree

Crabtree was a police officer working in London in 1953. DI Bishop and he investigated the mystery of the humans made faceless by the Wire. (TV: The Idiot's Lantern)

Personality
Crabtree served under DI Bishop. He spoke only what he thought was vital to the matter at hand. He was also not afraid to use violence — giving the Doctor a right hook to the face, knocking him out. (TV: The Idiot's Lantern)