Sorba's internal struggle with trust and alliances, shifting from suspicion of the Doctor to reluctant cooperation, influenced by past betrayals and present circumstances.

After Jamie twists his leg during the group’s descent into the mine shaft, the Doctor and Zoe investigate a groaning sound in the darkness. They discover Sorba, the injured Space …

The Doctor’s group, trapped in the mine chamber, discovers Lieutenant Sorba—a captured Space Corps officer—while Milo Clancey arrives, armed and insistent on leading them to safety. After a tense standoff …