Neville Jason

The Doctor attempts to gain entry to the castle to prevent the marriage of Romana to Prince Reynart and thwart Grendal's plans to rule Tara.

Arriving on Tara, Romana locates the fourth segment of the Key to Time with ease, but is captured by the scheming Count Grendel who wants the throne of Tara for himself.

While Romana makes her escape from the castle, the Doctor is lured to a meeting with an android duplicate of her that is programmed to kill him.

Grendel kidnaps Prince Reynart and seems set to be chosen as Tara's monarch when Reynart fails to arrive at his coronation. But the Doctor has a plan to scupper the Count's scheme.