Chops

From Tardis Wiki, the free Doctor Who reference

Chops was part of Sa Yy Findecker's security forces. He used to be a dingo. His brain was placed in a construct held together with magnets. The Fifth Doctor managed to augment his brain so that he became Chop's master. He sacrificed his life to save the Doctor, Tegan Jovanka and Turlough. (AUDIO: The Butcher of Brisbane)