Scotland, the near future. Something is smashing oil rigs off the Scottish coast, and UNIT have been called in to investigate. The Doctor discovers a colony of shapeshifting Zygons and their cyborg weapon, the Skarasen, and in the process solves one of Scotland's greatest mysteries...
Elenco:
William Hartnell
,
Patrick Troughton
,
Jon Pertwee
,
Tom Baker
,
Peter Davison
,
Colin Baker
,
Sylvester McCoy
.