The Brethren are a 16th century Christian group of corrupt monks led by Father Angelo and they one of the many villains in the Doctor Who series. They first appeared alongside their leader in the episode "Tooth and Claw". The members of this sinister cult which is originated in the European country of Scotland, could be recognized by their bald heads and orange or black robes. The Brethren used an unknown type of martial arts, though they weren't above shooting people. They might also have trained the Werewolf to fear mistletoe.