Terror of the Zygons (3)

Name: Terror of the Zygons (3)
Director: Douglas Camfield
Released: 1975-09-13
Duration: 25 min
Rating: 7.8
Cast: Nicholas Courtney, Ian Marter, John Levene, John Woodnutt, Lillias Walker

S13 E3 September 13, 1975 0h 25m ★ 7.8

Source:

Overview

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.