Third Doctor and Sarah Jane Smith's collaborative struggle against Sontaran technological domination

As Irongron’s forces draw near, the Doctor and Sarah prepare their final defenses in Sir Edward’s workroom. The Doctor reveals his true nature as a Time Lord, exposing his alien …

Disguised as humble monks exploiting the guard's blind faith in Irongron's reputation, the Doctor and Sarah infiltrate the castle fortress. The guard's gullible acceptance hinges on Irongron's outward appearance of …

The Doctor and Sarah discard their disguises and wait for Linx to pass before making their move. Sheathed in insider knowledge but stripped of their monkish cover, they weigh the …