The Doctor's urgent quest to uncover the true purpose and spatial significance of Terminus Station, driving the narrative forward with intellectual tension.

The Doctor frantically dismantles the ship’s computer systems to extract data about Terminus while Kari grows increasingly uneasy about lingering aboard the vessel. Her impatience clashes with his methodical search …

The Doctor and Kari question Olvir about Terminus while Nyssa pleads for his assistance. Olvir reveals the station’s true purpose: a commercial enterprise exploiting fear of Lazar’s disease to profit …