'The Lost Boy' (Part 2) by Phil Ford

Under cover of darkness, Sarah sneaks into the Pharos Para-Science Institute and steals the prototype telekinetic headset, using her sonic lipstick to evade the facility’s extreme defence system and make her escape. The following day, Maria learns that Clyde didn’t come home the previous night; with her dad’s help she breaks into the Stafford’s house, where they discover a skinsuit hanging on the door – the Staffords are Slitheen in disguise! Ignoring the orders of his Xylok master, Nathan instructs his fellow Slitheen to take Luke to the Pharos centre. Clyde comes to and is astonished to find himself trapped inside the computer, Mr Smith, who gloats that he is going to destroy the world. Seeing Sarah on a monitor screen entering the loft, Clyde tries to shout a warning, but his cries go unheard, and the intrepid reporter slots the stolen headset into Mr Smith’s console. Forced to deal with another unwelcome visit from his annoying ex-wife, Alan sends Maria to warn Sarah; when he receives a message from Clyde on his laptop warning that Mr Smith has gone bad, Alan immediately races to Sarah’s loft; he arrives just as Sarah’s request to Mr Smith for information on the Slitheen is met with derisive laughter – the computer has manipulated them all! Mr Smith opens fire with a deadly energy weapon, but Sarah, Maria and Alan manage to escape; then, discovering that Clyde has managed to interface with his systems, the evil computer renders his prisoner unconscious. Sarah tells Maria and Alan how she came to own Mr Smith: a geologist friend sent her a mysterious crystal that was thrown up years ago in the volcanic eruption of Krakatoa; when Sarah examined the crystal, it interfaced with her computer and revealed that it was a memory cell from an ancient alien spaceship; offering to help Sarah protect mankind, the device then designed and created a powerful computer in which to house itself. With mounting concern, Sarah realises that Mr Smith and the Slitheen want to join Luke’s mind with the Pharos equipment so that they can harness and sell his telekinetic energy. Breaking into the research facility, the Slitheen connect Luke to the telekinetic equipment; but Luke turns the tables, causing an overload that knocks out Jay Slitheen, allowing him to escape; shedding his skinsuit, Nathan sets off in pursuit… Having stopped off at a chippie for vinegar – the only way to kill Raxacoricofallapatorians – Sarah, Maria and Alan arrive at Pharos and confront ‘Jay’ and ‘Heidi’; however, Nathan takes Maria captive, forcing her friends to give up their weapons. When the aliens reveal that Mr Smith is a Xylok, Sarah tells them that the evil computer has used them to build the telekinetic energiser that will enable him to destroy the world. When Luke arrives at Sarah’s loft, Mr Smith uses the threat of killing Clyde to force him to don the headset; Luke complies – allowing Mr Smith to use the boy’s boosted powers to pull the moon out of orbit on a collision course with Earth! The resultant gravitational effects of the lunar shift begin to cause terrible tidal waves, fires, avalanches and storms… After Sarah convinces the Slitheen to help her, as they too will be destroyed, Alan uses one of his contacts to obtain the Armageddon Virus – a lethal code used by the FBI to eliminate rogue computer systems. Using Nathan’s teleport, Sarah materialises in her loft and confronts her villainous computer; Mr Smith reveals that the Xylok have been buried under the Earth’s crust for sixty-million years; but their crystalline forms have been regenerating, and by smashing open the planet he will able to finally release them. Believing the Xyloks to be better than humans, Mr Smith releases Clyde, who rematerialises in the loft. Mr Smith then levels his gun at Sarah, but the wily reporter manages to reach her safe – allowing her robot dog, K-9, to enter the conflict. During the ensuing gun-battle, Sarah manages to load the Armageddon Virus disc into Mr Smith, and it isn’t long before the renegade computer begins to lose his memory. Reiterating Mr Smith’s purpose to protect the Earth, Sarah orders him to return the moon to its orbit; the computer complies – and the threat to Earth is ended. With his mission completed, K-9 returns to the distortion zone to deal with the black hole. The Slitheen return to Raxacoricofallapatorius, leaving a triumphant Sarah, Maria, Luke, Clyde and Alan, and relieved Cassie to enjoy the evening. Safe in the knowledge that Mr Smith will reboot with his proper, altruistic function, Sarah enjoys spending time with those people she calls family…

Elisabeth Sladen (Sarah Jane Smith), Yasmin Page (Maria Jackson), Thomas Knight (Luke), Daniel Anthony (Clyde Langer), Joseph Millson (Alan Jackson), Juliet Cowan (Chrissie Jackson), Alexander Armstrong (Mr Smith [Voice]), John Leeson (Voice of K-9), Jay Simpson (Jay Stafford [Dak Fex Fize Slitheen]), Holly Atkins (Heidi Stafford [Bloorm Vungah Bart Slitheen]), Ryan Watson (Nathan Goss [Korst Gogg Thek Slitheen]), Floella Benjamin (Professor Rivers), Jason Mohammed (Newsreader), Paul Kasey (Jay Slitheen), Jimmy Vee (Carl Slitheen), Ruari Mears (Heidi Slitheen)

Directed by Charles Martin
Produced by Matthew Bouch
Executive Producers Russell T Davies and Julie Gardner
A BBC Wales production

TX:
19th November 2007 @ 5.30 pm CBBC
26th November 2007 @ 5.00 pm BBC 1

Notes:
*Featuring Sarah Jane Smith, Maria, Luke, Clyde, Mr Smith and K-9 MkIV