The Ark in Space (4) S8E8 - The Ark in Space (4) 1975
The Doctor tries to protect the humans still in cryogenic suspension from the Wirrn, who are determined to use Earth as their new breeding ground.
- Released: 1975-02-15
- Runtime: 50 minutes
- Genre:
- Stars: Tom Baker, Elisabeth Sladen, Ian Marter
- Director: Rodney Bennett