The Doctor and his companion, Ace , battle knights from another dimension, attempt to stop an ancient evil from poisoning the Earth, and encounter the Cheetah People, who are being manipulated by the Master
People from another dimension believe the Doctor is Merlin. The Doctor is also reunited with Brigadier Lethbridge-Stewart and U.N.I.T.






Knights in armour arrive to contine waging a war that began thousands of years ago
The Doctor and Ace explore King Arthur's spaceship deep under Lake Vortigern,
Morgaine threatens to unleash the Destroyer upon the planet unless the Doctor gives her what she wants.
The Brigadier slays the Destroyer while Morgaine takes control of UNIT's nuclear warhead.
Ace and the Doctor travel back to Victorian England, to a house she knew in her childhood.
Ace breaks the glowing panel in the spaceship and the Doctor learns of Smith's bizarre evolutionary experiments.
Smith's plans are revealed and the Doctor must convince the light not to destroy all of the life on Earth.
As Russian forces approach the English coastline, an ancient evil stirs beneath the surface of the water.
Millington and Judson's Ultima machine offers to break the chains of the Wolves of Fenric.
The Haemovores attack St Jude's church and the insane Millington willingly sacrifices his men.
The Ancient Haemovore stands upon the Earth once again, determined to change the future.
Trying to work out why people have been disappearing from Perivale, Ace is cornered by a Cheetah-Person.
The Doctor and a number of people from Perivale follow Ace to the Cheetah-People's world.
As the alien world dies around them, the Doctor and the Master fight like animals before escaping to Earth.
San Francisco, 1999, the Doctor is rushed to hospital, where surgery by Dr Holloway triggers a regeneration.
This episode premiered 12th May 1996 - Canada
Seventh Doctor
Sylvester McCoy
Ace
Sophie Aldred
Morgaine
Jean Marsh
Alistair Gordon Lethbridge-Stewart
Nicholas Courtney
Peter Warmsly
James Ellis
Brigadier Winifred Bambera
Angela Bruce
Mordred
Christoper Bowen
Ancelyn
Marcus Gilbert
Doris
Angela Douglas
Pat Rowlinson
Noel Collins
Elizabeth Rowlinson
June Bland
Shou Yuing
Ling Tai
Sergeant Zbrigniev
Robert Jezek
Flight Lieutenant Lavel
Dorota Rae
Knight Commander
Stefan Schwartz
Major Husak
Paul Tomany
Stunt Man
Alf Joint
The Destroyer
Marek Anton
Seventh Doctor
Sylvester McCoy
Ace
Sophie Aldred
Josiah
Ian Hogg
Mrs Pritchard
Sylvia Syms
Redvers Fenn-Cooper
Michael Cochrane
Control
Sharon Duce
Gwendoline
Katharine Schlesinger
Reverend Ernest Matthews
John Nettleton
Nimrod
Carl Forgione
Mrs Grose
Brenda Kempner
Inspector Mackenzie
Frank Windsor
Light
John Hallam
Seventh Doctor
Sylvester McCoy
Ace
Sophie Aldred
Dr. Judson
Dinsdale Landen
Commander Millington
Alfred Lynch
The Rev. Mr. Wainwright
Nicholas Parsons
Miss Hardaker
Janet Henfrey
Captain Sorin
Tomek Bork
Sgt. Prozorov
Peter Czajkowski
Vershinin
Marek Anton
Petrossian
Mark Conrad
Jean
Joann Kenny
Phyllis
Joanne Bell
Nurse Crane
Anne Reid
Kathleen Dudman
Cory Pulman
Baby
Aaron Hanley
Captain Bates
Stevan Rimkus
Sgt. Leigh
Marcus Hutton
Perkins
Christien Anholt
Ancient Haemovore
Raymond Trickett
Seventh Doctor
Sylvester McCoy
Ace
Sophie Aldred
The Master
Anthony Ainley
Paterson
Julian Holloway
Karra
Lisa Bowerman
Harvey
Norman Pace
Len
Gareth Hale
Midge
William Barton
Shreela
Sakuntala Ramanee
Derek
David John
Stuart
Sean Oliver
Ange
Kate Eaton
Woman
Kathleen Bidmead
Squeak
Adele Silva
Neighbour
Michelle Martin