Peter Davison stars as the 5th Doctor in this Black Guardian Trilogy 4DVD set. In "Mawdryn Undead Special Edition", a group of alien mutants hover over an English public school waiting to die as the Black Guardian recruits a young man named Turlough to assassinate the Doctor. In the following story "Terminus", the TARDIS attaches itself to a space liner after Turlough, damages its controls. The final part "Enlightenment Special Edition", sees the Eternals sail through the universe, racing for the ultimate prize. Also included is a new movie format edit of Enlightenment, audio commentaries and deleted and extended scenes.