Doctor Who: The Key To Time - Special Collector's Edition [DVD Box Set]Doctor Who: The Key To Time Special Collector's Edition DVD Box Set follows the Doctor on a quest to find the six disguised segments of the Key to Time. Follow the Doctor (Tom Baker) and Romana's year long search for the Key to Time in this special six disc collection that includes "The Androids of Tara," "The Ribos Operation," "The Pirate Planet," "The Stones of Blood," "The Power of Kroll," and "The Armageddon Factor." The White Guardian of Time