Stories Television Doctor Who Season 13 Serial: 1 2 3 4 5 6 Terror of the Zygons 1 image Overview Episodes Characters How to Watch Reviews 10 Statistics Related Stories Quotes 4 Transcript Overview First aired Saturday, August 30, 1975 Production Code 4F Written by Robert Banks Stewart Directed by Douglas Camfield Runtime 100 minutes Time Travel Present Tropes (Potential Spoilers!) Companion Doppelgänger, Earth Invasion, Environmental Message, Shape Shifting, Spaceship Inventory (Potential Spoilers!) Sonic Screwdriver Location (Potential Spoilers!) Earth, England, London, Scotland, Tulloch Moor, Westminster Synopsis Having received an urgent request for assistance from the Brigadier, the Doctor, Sarah and Harry arrive in Scotland, where they discover that a mysterious force has destroyed three oil rigs. The mystery deepens when a piece of wreckage is found with giant teeth marks on it. The trail leads them to the shores of Loch Ness where they find that the legendary monster really does exist — and is the murderous tool of the Zygons, aliens intent on overpowering the planet. Watch Watched Favourite Favourited Add Review Edit Review Log a repeat Skip Skipped Unowned Owned Owned Save to my list Saved Edit date completed Custom Date Release Date Archive (no date) Save 4 Episodes Part One First aired Saturday, August 30, 1975 Runtime 25 minutes Written by Robert Banks Stewart Directed by Douglas Camfield UK Viewers 8.4 million Appreciation Index 59 Synopsis Scotland, the near future. Something is smashing oil rigs off the Scottish coast, and UNIT have been called in to investigate. The Brigadier summons the Doctor to Earth to help in the investigation, but it soon becomes clear some kind of alien presence is at work... Part Two First aired Wednesday, September 3, 1975 Runtime 25 minutes Written by Robert Banks Stewart Directed by Douglas Camfield UK Viewers 6.1 million Synopsis The Zygon traps the Doctor and Sarah Jane in a decompression chamber while Harry is taken to the aliens' underwater ship. Part Three First aired Saturday, September 13, 1975 Runtime 25 minutes Written by Robert Banks Stewart Directed by Douglas Camfield UK Viewers 8.2 million Appreciation Index 54 Synopsis 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. Part Four First aired Saturday, September 20, 1975 Runtime 25 minutes Written by Robert Banks Stewart Directed by Douglas Camfield UK Viewers 7.2 million Synopsis UNIT attempt to track down the Zygon ship while Broton prepares to have the Skarasen attack London. Show All Episodes Characters Fourth Doctor Tom Baker Sarah Jane Smith Elisabeth Sladen Harry Sullivan Ian Marter Zygons First Appearance Skarasen First Appearance The Brigadier Nicholas Courtney UNIT John Benton John Levene Show All Characters (8) How to watch Terror of the Zygons: Watch on iPlayer DVD Terror of the Zygons DVD The Fourth Doctor Time Capsule VHS Terror of the Zygons (VHS) (1st edition) VHS Terror of the Zygons (VHS) (2nd edition) Reviews Add Review Edit Review Sort: Date (Newest First) Date (Oldest First) Likes (High-Low) Likes (Low-High) Rating (High-Low) Rating (Low-High) Word count (High-Low) Word count (Low-High) Username (A-Z) Username (Z-A) Spoilers First Spoilers Last 10 reviews 13 June 2025 · 72 words Review by kawaii2234 I adore how terrible the Zygons are at impersonation. None of them come across as human they're stilted and unsettling, it really adds to the horror factor of the serial. Props to harry for leaving the moment he is physically able to, proving himself to be the smartest companion of the doctor. Minus a star for the bagpipes, there's nothing wrong with their inclusion in the story I just really hate bagpipes kawaii2234 View profile Like Liked 0 21 May 2025 · 89 words Review by greenLetterT Solid UNIT story all things considered! I loved how squelchy the Zygon ship was, I truly have a fondness for spaceships that are full on just Fleshy. Apparently though nobody can write a Zygon story without it being weird politically - oh so there's a ship full of what are explicitly stated to be refugees and they can look just like you (bad thing! can't see them coming!) and they want to turn this place into a replica of their home? Is that the message we're going for here? greenLetterT View profile Like Liked 0 20 May 2025 · 55 words Review by Scottybguud A great start to season 13. Possibly my favourite from the season. Having the unit regulars is always welcome. The Zygons are a really good alien species, it's surprising they aren't used again until the 50th anniversary. Despite the visuals of the Loch Ness monster, it was a fun idea to use it as another threat. Scottybguud View profile Like Liked 0 30 April 2025 · 72 words Review by Jonathan_ Spoilers This review contains spoilers! Great episode. The costumes and story were even better than usual in this one I think, the Zygons are terrifying and their plan is pretty diabolical. I guess if I had one criticism of this episode it's that they could have used the shape shifting more, it kinda stops being relevant the longer the story goes on. Then again I went in already knowing what a Zygon is so maybe that's unfair Jonathan_ View profile Like Liked 0 24 April 2025 · 30 words Review by Azurillkirby A really fun serial and introduction to the Zygons. A lot of fun back-and-forth scheming between the two sides. I really like the transformation effect between human and Zygon. A. Azurillkirby View profile Like Liked 0 Show All Reviews (10) Open in new window Statistics AVG. Rating509 members 3.82 / 5 Member Statistics Watched 938 Favourited 82 Reviewed 10 Saved 9 Skipped 3 Related Stories Other adaptations of this story: We define an adaptation as a recreation of a similar story but on a different medium or with different characters. Target Collection Doctor Who And The Loch Ness Monster Rating: 3.75 Story Skipped Book Reviews(1) More Actions View Sets Close Related Sets Set of Stories: Target Collection Add Review Edit Review Skip Skipped Unowned Owned Save to my list Saved Quotes Add Quote Link to Quote Favourite FORGILL: I underestimated his intelligence, but he underestimated the power of organic crystallography. — Terror of the Zygons Show All Quotes (4) Open in new window Transcript Needs checking Part One [Oil rig radio room] MUNRO: (laughing) Hey, listen, Willie. With tomorrow's supply 'cop trip, can you no send over a few haggis? The chef we have here doesnae ken the first thing about (Interference comes down the link.) MUNRO: Willie? Hello, Willie, can you hear me? Over. This is Charlie Rig to Hibernian Control. Are you receiving? I say again, Charlie Rig to Hibernian Control. Do you read me? Over. Show Full Transcript Open in new window