Threshold ( audio story ) Threshold was the first audio story in Big Finish Productions ' first series of " Counter - Measures " . It featured Simon Williams , Pamela Salem and Karen Gledhill reprising their roles as Professor Rachel Jensen , Dr Allison Williams and Group Captain Ian Gilmore from the 1988 " Doctor Who " television story " Remembrance of the Daleks " . Publisher ' s summary . A missing scientist and ghostly phenomena bring Gilmore and Allison to a factory in Bermondsey , and the discovery of a science that should not exist . As Rachel Jensen returns to help them , a new future for Counter - Measures is set in motion . . . Plot . In 1964 , three - quarters of Group Captain Ian Gilmore ' s troops in the Intrusion Countermeasures Group ( ICMG ) have been re - assigned to the Ministry of Defence and are stationed in Cyprus . His superior at the MoD is Sir Tobias " Toby " Kinsella . Professor Rachel Jensen has been conducting research into artificial intelligence at the Cavendish Laboratory in the University of Cambridge since 1962 . She was instructed by her superiors to make use of her holiday days so she arranged to meet up with her former student Allison Williams , who has finished her degree and obtained her doctorate since the Shoreditch Incident . Allison worked with Professor Heinrich Schumann at the British Rocket Group . She believes that Schumann has succeeded in creating a matter transfer device . He was found unconscious in one of the transmat pods , having presumably been teleported from one pod to the other . The doctors are unsure as to whether he will recover . Schumann powered the device using the street lights outside Bermondsey Electronics . According to Allison , Rachel never accepted Schumann ' s presence in the BRG as she is Jewish while Schumann was a former Nazi who had worked on Adolf Hitler ' s advanced weapons research programmes during the Second World War . He is rumoured to have used human test subjects in his experiments . However , the British government never charged him with war crimes as they wanted to make use of his scientific acumen . While Gilmore voices his disapproval at the United Kingdom using Schumann ' s data for their experiments , Sir Toby claims that it was better that the UK gained access to his skills than the Soviet Union . On his tapes , Schumann remarked that the only god in which he believed was Hitler but he became an atheist after Hitler committed suicide on 30 April 1945 . Given his wartime crimes , he hoped that there was no God as he feared the punishment which he would face if they were . Lt . Carver is aware that Jenny Haveloc is having an affair with Allison ' s driver Simkins , who is a married man . He uses this as leverage to prevent her from reporting to Gilmore , whom he refers to by his nickname " Chunky " , that he was drunk when he came on duty . Shortly after Carver ' s arrival , the matter transmission device at the factory activated itself . At the same time , Schumann regained consciousness in St . Hugo ' s Hospital but was still delirious . Rachel believes that the strange noises which she , Gilmore , Allison , Schumann and Carver heard in the Bermondsey factory were caused by the accidental activation of the intercom which has been picking up radio singles from all over London . However , on further investigation of the factory , Rachel and Allison hear the voice of a little girl crying out for her mother . Concurrently , while at home in bed , Carver hears the girl crying out for her father and assumes that it is his daughter calling for him . Rachel determines that the Schumann device may be a portal to another time or place . Her theory is that Schumann was assisted in creating the device , perhaps subconsciously , by an alien life form which sought to set itself free . Schumann succeeded in teleporting a wristwatch , a shoe and a toy but he claimed that they were damaged by interstitial thrust when they arrived at their destination pod . However , Rachel believes that they have in fact rotted . After regaining consciousness , Schumann strangles his nurse at St . Hugo ' s and shoves her corpse into a cupboard . He then makes his way to the factory and reactivates the matter transfer device . This causes his caravan to shake and one of its drawers to open while Rachel is investigating his papers . Furthermore , the toy which he transferred in the Schumann device ( a talking doll in the shape of a little girl ) picks up a scalpel and begins advancing towards Rachel . Rachel believes that it was being manipulated by a powerful telekinetic force which is alien in origin , as was the equipment in the factory . Although there was only a gap of fifty yards between the two pods , Rachel believes that Schumann and the items which he transferred through the device travelled through what science fiction writers have called hyperspace , possibly all across the universe and for hundreds of years . This accounts for the fact that the wristwatch , the shoe , the doll and Schumann ' s clothes rotted with age . However , Schumann and later Carver were preserved through the centuries by an alien collective who took control of their bodies . The collective ' s plan was to take over not only Earth but all of reality . Carver ' s personality reasserted itself and he sacrificed himself to save Gilmore , Rachel and Allison . The collective was converted into pure energy and channelled through the intercom as sound waves and was dispersed . Rachel agrees to come aboard Counter - Measures in a permanent capacity on the condition that she will be supplied with the facilities to continue her artificial intelligence research on site and that she will replace Gilmore as its leader . However , she assures him that she will defer to his judgement in all matters of security . Story notes . " to be added "