The Doctor versus the Black Guardian
The Fourth Doctor faces the manipulative and malevolent Black Guardian, who seeks to control the Doctor's destiny and the balance of causality. Their encounters span time and space, with the Doctor resisting the Guardian's efforts to turn him to evil.
Involved Characters
Arc Timeline
Season 16
2 eventsThe Doctor completes assembly of K9 Mark II, eager to embark on a promised holiday to Halergan Three with his companion. Just as the Doctor describes beaches and sunshine to …
The White Guardian interrupts the Doctor's holiday to assign a cosmic mission of grave importance. Forced to abandon his retreat, the Doctor learns of the Key to Time, a sentient …