While Doctor Who is the lead of the show, there is usually a trio of people who make up the stars of the series.

Doctor Who (1963–1996) — Season 12, The Sontaran Experiment: Part 1 Arriving on Earth, the Doctor, Harry and Sarah meet a group of stranded human colonists. BBC One ...

Martha Jones summons the Doctor back to modern-day Earth, but an old enemy lies in wait. With Michelle Ryan. David's video diary from Dubai. Facts and figures from Captain Jack. How scary is the ...

Colonist Erak was played by Peter Walshe who would return to Doctor Who again in The Masque of Mandragora as a Pikeman. Both episodes of The Sontaran Experiment have been restored and remastered ...