The crew's unified struggle against the alien ship's temporal corruption and Mawdryn's interference, forcing them to reconcile disparate loyalties and technologies to survive and restore order

Tegan refuses to accept Mawdryn’s claim to be the Doctor, dismantling his deception through sharp observation. She notes key differences between the Transmat-induced regeneration and prior changes the Doctor has …

The newly regenerated Doctor acts decisively to stabilize the crisis unfolding aboard the alien vessel. With his unstable regenerating body still asserting control over his limbs and mind, he issues …