The Brain of Morbius is the fifth serial of the 13th season of the British science fiction television series Doctor Who, which was first broadcast in four weekly parts on BBC1 from 3 to 24 January 1976. The screenwriter credit is given to Robin Bland, a pseudonym for writer and former script editor Terrance Dicks, whose original script had been heavily rewritten by his successor as script editor, Robert Holmes. It is the first serial to feature the Sisterhood of Karn.