Terror of the Zygons (3)
Run Time: 25 mins
Air Date: Sat, 13 Sept 1975
Average Rating: ⭐ 7.6 (5 votes)
BBC One BBC TelevisionSeason 13 - Episode 3
Average Rating: ⭐ 7.6 (5)
The Doctor and the Brigadier begin to realise who the Zygon imposters among them are while Sarah Jane discovers a secret tunnel to the underwater ship.