Written by Robert Banks Stewart
"But you can't rule a world in hiding. You've got to come out onto the balcony sometimes and wave a tentacle"
| Episode Title | Premiere Date |
| Episode 1 | 30/08/1975 |
| Episode 2 | 06/09/1975 |
| Episode 3 | 13/09/1975 |
| Episode 4 | 20/09/1975 |
Returning to Earth, the Doctor, Sarah and Harry arrive in the Scottish Highlands to investigate the mysterious destruction of several oil rigs in the North Sea. Local superstition speaks of a deadly threat that lurks in the mists on Tulloch Moor, but the truth is even more disturbing: the legendary Loch Ness Monster is a terrifying cyborg beast which is controlled by the Zygons, an advanced alien race who are desperate to ensure their own survival, at any cost...
Cast & Crew
The Doctor: Tom Baker
Sarah Jane Smith: Elisabeth Sladen
Harry Sullivan: Ian Marter
Brigadier Lethbridge-Stewart: Nicholas Courtney
RSM Benton: John Levene
Duke of Forgill/Broton: John Woodnutt
Sister Lamont: Lillias Walker
Angus: Angus Lennie
Huckle: Tony Sibbald
Munro: Hugh Martin
Producer: Philip Hinchcliffe
Director: Douglas Camfield
Scriptwriter: Robert Banks Stewart
