Head Games is an original novel written by Steve Lyons and based on the long-running British science fiction television series Doctor Who. It features the Seventh Doctor, Bernice, Chris, Roz, Mel and Ace. Head Games is a sequel to Lyons' earlier New Adventure Conundrum, and again features the Land of Fiction first seen the 1968 serial The Mind Robber. Head Games continues a theme running through the New Adventures starting from Timewyrm: Revelation in which the Doctor becomes Time's Champion, and that previous incarnations still in some sense exist within his mind. This novel suggests that the Seventh Doctor was somehow able to terminate the life of his previous incarnation on Lakertya (in the story Time and the Rani) in order to become Time's Champion. This in turn caused the Sixth Doctor to eventually turn into the Valeyard — the evil version of the Doctor seen in the serial The Trial of a Time Lord. Plot A flaw in the structure of the Universe is allowing energy from the Land of Fiction to seep through. The Doctor and his companions must close the gap to save the Universe, but the TARDIS is unable to navigate the crystallised cloud of fictional energy around the gap. The Doctor lands on the crystal's surface, and he, Benny and Chris pass through the crystal, navigating through their individual dreams as the fictional energy gives them form. Once they reach the crystal's interior they must put force-field generators in place around the gap, and Roz, who is waiting by the controls in the TARDIS, will then be able to squeeze the gap shut. But the Doctor has withheld one fact from his companions for fear of alienating them. The gap has opened above the dying planet Detrios, and its inhabitants have unwittingly reshaped the fictional energy into the crystal Miracle which is providing light and power to their world. When the Doctor closes the gap, the Miracle will vanish, and Detrios really will be doomed. Things get even more complicated when the fictional energy finds a focus in Jason, the young Writer who was returned to Earth by the Time Lords after the Doctor's last encounter with the Land of Fiction. As the fictional energy floods into this Universe, Jason finds that his wishes and dreams are coming true. A fictional double of the Doctor, Dr. Who, appears in the TARDIS, knocks out the real