A tearful couple appear on television to appeal for the return of their lost son, Ashley. According to Mr. Smith's analysis of the boys' DNA, 'Ashley' and Luke are the same person and, after Chrissie Jackson has called the police, a reluctant Luke is returned 'home'. He is locked in his room by the couple, who are, in fact Slitheen, as is another boy, a child genius called Nathan, though Luke knew him previously as Carl. The Slitheen get in touch with 'the Xylok', for instructions, but the Xylok turns out to be Mr. Smith, who has turned rogue and plans to destroy the Earth by releasing others of the Xylok race. Written by
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Did You Know?
The location of the Pharos Institute is in fact Margam Castle. This location is frequently used in "The Sarah Jane Adventures", like the previous episode " Eye of the Gorgon". By using various entrances, it looks like many different places, providing great backdrops for each episode that it is used. See more
Maria's French teacher admonishes her to "dépêchez-vous" (hurry up), but a teacher speaking to a student would properly use the informal "dépêches-toi". See more