The Doctor faces an old foe in each story this season, bids farewell to Nyssa and welcomes troubled alien Turlough and shape-changing robot Kamelion aboard the TARDIS.
The Doctor discovers the English King is a shape-changing android called Kamelion!
The Eternals are having a space race, but one works for the Black Guardian...
Terminus is the refuge of plague victims, dumped there by an uncaring Company.
The Black Guardian employs Turlough to kill the Doctor.
The Mara, still hiding within Tegan's subconscious, wants to be reborn...
2/2 The Master and the Doctor fight for control of Kamelion's mind.
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