Doctor Who
Terror of the Zygons, Part Three
Season 13, Episode 3 · Aired 1975-09-13
Synopsis
The Doctor and the Brigadier begin to realise who the Zygon imposters among them are while Sarah discovers a secret tunnel to the underwater ship.
In the series
This episode is part of Doctor Who (1963–) on BBC.
A time-traveling renegade in a police box — regeneration as infinite franchise life.
Key cast
- William Hartnell as The First Doctor
- Patrick Troughton as The Second Doctor
- Jon Pertwee as The Third Doctor