Tegan's determination to follow and confront the Doctor during a life-or-death crisis strains their friendship and challenges her willingness to accept his protection

Trapped in the suffocating dark beneath the space liner's floor plates, Tegan and Turlough struggle to re-materialize the TARDIS doorway as the liner's failing systems emit a low hum. A …

Tegan reunites with the Doctor after her risky efforts to reach him, only to face immediate contention as he objects to her having followed him in defiance of his instructions. …

Nyssa resolves to remain on Terminus as the station's departure sequence is disabled and the Garm freed from servitude. She reveals her decision to stay behind, dedicating herself to healing …