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