Mawdryn and his fellow immortals - stuck in ceaseless cycles of mutation and deterioration - are quite determined on the Doctor sacrificing his future for their sakes, giving him the choice between helping them or stranding Teagan and Nyssa with them on their infinite journey. The Doctor, however, seeks a third option.
Did You Know?
This episode was watched by 7.7 million viewers on its original transmission. See more
Will the mutants really travel through the rest of time?
I'm afraid so.
Sometimes you have to live with the consequences of your actions.
Referenced in Talking About Regeneration