Face Value ( short story ) Face Value was the eighteenth short story in the Short Trips anthology " Short Trips and Side Steps " . It was written by Steve Lyons . It featured the Sixth Doctor , Jason , Crystal and Zog . Summary . The Doctor , Crystal , Jason and Zog have landed on the leisure world of Krennos . They land outside the dome and have to fight sucking mud and moving trees to get there . While they struggle , the Manager watches them on screen with Susie . They have been investigating disappearances for weeks , and Susie thinks they should investigate . The Manager is too weak to make a decision , so Susie sends two people out . The two rescuers reach the travellers and rescue Crystal , Jason and Zog , but the Doctor has disappeared beneath the mud . Safe inside the dome , but locked up , Jason and Crystal discuss the Doctor ; the Manager watches on screen , and he , Gerry and Susie wonder if it ' s the same " Doctor " they have met before . To avoid suspicion , the Manager has them released . All cleaned up , the trio sit in the ballroom , eating and listening to music . The food is bad and the musicians are out of key ( and clumsy ) . Zog sneaks off and finds the swimming pool , but what he sees there terrifies him and he runs away screaming . The Manager sees this , and decides Zog needs to be killed . Zog is chased by Susie and Gerry , and runs into Jason . The Manager now wants them all killed . Two of the Happy Campers sneak into Crystal ' s room as she sleeps and blast away at her . As the Manager watches on screen , he is confronted by the Doctor , who has finally broken free of the planet and made his way into the dome . He pretends he knows what the Manager is up to , but before the Manager can explain , Gerry and Susie enter and say that it wasn ' t Crystal that was killed , it was Madeleine . The Manager rescinds the order to kill the Doctor ' s companions , and begins to explain . Meanwhile , Crystal wakes in the swimming pool . There is no water , but she is surrounded by bodies . At first she thinks they ' re dead , but they ' re just unconscious . She notices a white band on her arm , and rips it off . She meets up with Jason , who is almost hypnotised by a ball of light . He tries to leave the dome , but Crystal tackles him and he snaps out of it . Suddenly , a plant from outside begins to break down the dome wall . The Doctor learns that the Manager and the other Happy Campers are Chameleons . They have sent away the scientists and kept the managerial staff . Unfortunately , they don ' t know how to take care of the planet , and it is now attacking the dome . They haven ' t fed the planet , and it has been absorbing people that leave the dome ( by following the ball of light ) . The Doctor tries to communicate telepathically with Krennos , as he did when he was under the mud , but he can ' t reach it . The dome wall is being broken everywhere , and plant tendrils are grabbing Chameleons and others alike . In his office , the Manager , who was using Blade the last time he met the Doctor , makes a decision . He converts himself to one of the plants , and the attack stops . The Doctor tells the Chameleons that they will have to be " deprocessed " . He tells them the Manager put Krennos into a kind of coma . He talks to the real staff , and tells them that Krennos must be evacuated . The TARDIS crew leaves , with Zog planning his takeover of the universe .