The Pirate Planet

099 – *The Pirate Planet*
099 – The Pirate Planet
Doctor Who serial
Cast
	Doctor Tom Baker – Fourth Doctor;
	Companions Mary Tamm – Romana; John Leeson (Voice of K9);
	Others Bruce Purchase – The Pirate Captain; Andrew Robertson – Mr. Fibuli; Rosalind Lloyd – Nurse; David Warwick – Kimus; David Sibley – Pralix; Ralph Michael – Balaton; Primi Townsend – Mula; Clive Bennett – Citizen; Bernard Finch – Mentiad; Adam Kurakin – Guard;
Production
Directed by	Pennant Roberts
Written by	Douglas Adams
Script editor	Anthony Read
Produced by	Graham Williams
Executive producer(s)	None
Music by	Dudley Simpson
Production code	5B
Series	Season 16
Running time	4 episodes, 25 minutes each
First broadcast	30 September 1978
Last broadcast	21 October 1978
Chronology
← Preceded by; The Ribos Operation	Followed by →; The Stones of Blood
	List of episodes (1963–1989)

The Pirate Planet is the second serial of the 16th season in the British science fiction television series Doctor Who, which was first broadcast in four weekly parts on BBC1 from 30 September to 21 October 1978. It forms the second serial of the Key to Time story arc. It was written by Douglas Adams and features some of his humour.

The tyrant Queen Xanxia (a dual role played by Vi Delmar and Rosalind Lloyd) and the Captain (Bruce Purchase) use the hollow planet Zanak as a spaceship that surrounds smaller planets, including Calufrax, the second segment of the powerful Key to Time in disguise, to plunder the planets' resources that help keep Xanxia alive.