Nyssa of Traken’s internal conflict between her Traken-trained logic and instinctive humanitarian impulse, especially when faced with Mawdryn’s suffering and Tegan’s emotional reactions

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 …

Mawdryn collapses into raw vulnerability, his plea for death shattering the companions' resolve. He extends his shaking hands not for aid but for annihilation, his ravaged existence pushing beyond endurance. …

With passionate resolve the Brigadier urges immediate mercy despite the risks, while Nyssa shocks Tegan by consciously choosing to trust an unknown alien rather than the erratic Doctor. Their decision …