Terror of the Zygons

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Story Code: 4F / Season 13 UK Airdate: 30 Aug to 20 Sep 1975 Doctor: Tom Baker
First airings by location UK Repeats / Foreign Cable and Satellite Previous Story / Next Story

This story aired in the following known countries. They are listed in chronological order according to known airdate. If no month is noted, the actual airdate is not confirmed, and is a close approximate. (Refer also to Selling Doctor Who for expanded airdates.)

Terror of the Zygons screened on Super Channel in April 1983; this clipping is from a Dutch newspaper
Netherlands Dec 75 PAL
United Arab Emirates 77? PAL
Australia Feb 78 PAL
New Zealand Sep 78 PAL
United States* Sep 78 NTSC
Hong Kong Jan 79 PAL
Canada Feb 79 NTSC
Gibraltar 79? PAL
Brunei Apr 79 PAL
Chile c May 79 NTSC
Nigeria May 79 PAL
Mexico Jul 79 NTSC
Puerto Rico Jan 80? NTSC
Costa Rica Feb 80 NTSC
Swaziland Feb 80 PAL
Ecuador Jun 80? NTSC
Nicaragua Aug 80 NTSC
Brazil 80? PAL
Venezuela 81 NTSC
Italy Oct 81 PAL
Honduras ? NTSC
Bahrain 82? PAL
  • (*) The US date is based on the airdates for WTEV, which was the first US station to screen the initial package of 98 Tom Baker episodes.
  • This story was dubbed into Spanish (for Latin America); Italian; French; Japanese; Catalan, Galician and Spanish (for Spain); and subtitled in Dutch, and Swedish.
  • This story was often shown after Genesis of the Daleks, the stories being screened in production code order.


  • The story was reissued in the mid-1980s, during the THIRD WAVE of sales.
Monaco Dec 83 PAL
Sri Lanka Apr 84 PAL
Saudi Arabia mid-85? NTSC
Armed Forces Network Apr 86 NTSC
Trinidad & Tobago Apr 86 NTSC
Barbados/Saint Lucia Apr 86 NTSC
Greece Apr 87 SECAM
Seychelles Apr 87 PAL
Spain Apr 88 PAL
France May 89 SECAM
Japan Oct 89 NTSC
Sweden Nov 96 PAL
Poland Jun 02 PAL

US TV Guide descriptions

More Information
Title: Terror of the Zygons

  • Part 1: The Doctor investigates the mystery of Loch Ness.
  • Part 2: The Zygons launch a powerful weapon from the depths of Loch Ness.
  • Part 3: The Zygons begin their conquest of the world.
  • Part 4: The Zygons capture the Doctor and threaten to destroy London.
  • Compilation: Investigating the mystery of Loch Ness, Dr. Who makes Zygons be bygones.