In the third episode of the four-part story "The Hand of Fear," the newly regenerated Kastrian criminal Eldrad (Judith Paris) persuades the Doctor (Tom Baker) and Sarah (Elisabeth Sladen) to take her back to her long-dead home planet, in hopes of reclaiming her birthright. The Doctor does not yet know that Eldrad intends to mount an invasion of Planet Earth, nor that "she" is really a rather malevolent "he." Written by Bob Baker and Dave Martin, "The Hand of Fear, Episode 3" originally aired on October 16, 1976. ~ Hal Erickson, Rovi