Doctor Who, Season 13, Terror of the Zygons Episode guide
4/4 Broton the Zygon warlord intends to use the Skarasen to attack London.
First broadcast: 20 Sep 1975
3/4 The Doctor and Sarah find their way into the Zygon spaceship at the bottom of Loch Ness.
First broadcast: 13 Sep 1975
1/4 Something is destroying oil rigs off the coast of Scotland. UNIT investigates!
First broadcast: 30 Aug 1975