In the conclusion of the five-part story "The Mind Robber," the Doctor (Patrick Troughton) and Zoe (Wendy Padbury) wend their way through a Lewis Carroll-like maze, somewhere in the Land of Fiction. Emerging from the confusion, the two time travellers come face to face with the Master (Emrys Jones), who explains he is the creator of a world comprised entirely of characters and locales taken from Earth Literature. The Master then demands that the Doctor take his place -- with dire consequences for Zoe and Jamie (Frazer Hines) if his demands are not met. Written by Derrick Sherwin and Peter Ling, "The Mind Robber, Episode 5" originally aired on October 12, 1968. ~ Hal Erickson, Rovi