Release Message:  Mawdryn and his fellow immortals - stuck in ceaseless cycles of mutation and deterioration - are quite determined in the Doctor (Peter Davison) sacrificing his future for their sakes.

Description:  Mawdryn and his fellow immortals - stuck in ceaseless cycles of mutation and deterioration - are quite determined in 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.