Tegan's traumatic realization of Nyssa's absence aboard the Terminus space liner, driving her urgency to find the Doctor and face the unknown threat.

Tegan’s confrontation erupts as the Doctor abandons caution to save Nyssa, sending her through an unstable TARDIS portal. The Doctor’s admission of uncertainty masks the brutal necessity of his choice—the …

The Doctor and Nyssa reunite in the suffocating corridors of the doomed space liner, their fragile reunion shattered by the liner’s true nature. He warns of the liner’s horrors while …