The Black Guardian Saga
A long-form conflict involving the Fifth Doctor and the Black Guardian, a cosmic entity embodying chaos and malevolence, along with his counterpart the White Guardian. This arc spans multiple storylines, including Turlough’s moral dilemma, the Doctor's repeated thwarting of the Black Guardian’s schemes, and the ultimate resolution through trials of faith and loyalty.
Involved Characters
Arc Timeline
Season 20
12 eventsCornered in a liminal void between life and death, Turlough faces the Black Guardian, who exploits his hatred of Earth and craving for escape. Against logic and self-interest, he forfeits …
Alone after the Headmaster and Matron leave, Turlough retrieves the glowing crystal from beneath his pillow. Its sudden illumination dispels his earlier denial, confirming the Black Guardian is not a …
Turlough steps onto the spaceship bridge through the transmat capsule, clutching the glowing crystal that binds him to his pact with the Black Guardian. His initial excitement at the vessel’s …
The 1977-era Brigadier enters the mutated scientists' vessel to find the TARDIS vanishing, confronting Mawdryn about the Doctor's unexplained absence. Mawdryn reveals the Doctor is trapped inside the ship amid …
The disoriented 1977-era Brigadier arrives on the mutated scientists' ship moments after the TARDIS departs, only to face Mawdryn's dire warning about temporal catastrophe. The mutants' cryptic pronouncement that their …
The two versions of the Brigadier stand face to face in the laboratory, decades apart yet bound by the same past. Confusion and hostility give way to recognition as the …
The TARDIS corridor fills with a creeping mist of unnatural origin, seeping from Nyssa’s quarters. Tegan stumbles upon the phenomenon and immediately alerts the Doctor, who rushes to the source. …
Turlough’s covert tampering with the TARDIS systems is exposed as he scrambles to hide his involvement just as the Doctor and Tegan burst into the control room. The Doctor immediately …
Nyssa’s failing health forces the group to stop as she pleads for rest during their escape from the space liner. As she reveals her illness—Lazar’s disease—the situation turns desperate when …
The space liner’s corridors are overtaken by noxious gas as Terminus activates its lethal sterilization protocols. Kari’s warning arrives just in time for the Doctor to identify the threat as …
The Doctor’s survival triggers the Guardian’s wrath, which erupts through its crystalline core. Already manipulating Turlough with calculated cruelty, the alien reveals the emptiness of his loyalty—justified as a bad …
Turlough lies helpless on the TARDIS floor, his body reacting to the Guardian’s insidious influence. The villain’s voice taunts him through the scanner, threatening consequences if he does not obey. …