Zygon : When Being You Just Isn ' t Enough ( home video ) When Being You Just Isn ' t Enough was a " Doctor Who " spin off film released in 2008 by BBV Productions . Publisher ' s summary . They ' ve been stranded on Earth for 20 years , so Zygon commander Kritakh , and his second , Torlakh , have had plenty of time to re - create their world . The trouble is that Kritakh , aka engineer Mike Kirkwood , has lost his sense of purpose . Can Torlakh , aka mass murderer Bob Calhoun , get him back on track . Enter sexy Psychiatrist Lauren Anderson , first , to be tempted by her innermost desires and then to face her greatest challenge . Can a violent heart really be tamed by love and what is the ultimate price to be paid ? Plot . Michael Kirkwood is seeing a medical doctor named Lauren Anderson over strange dreams that he has been having . He dreams that he is a monster , a shape - shifting alien called a " Zygon . " She tries to help him discover what these dreams mean . One day , she encounters an old man , who tells her that she has to help him retain his real memories . She tells Michael about this . A medical scan shows that he is not human , or at least not of recognisable DNA . All turns for the worst when , in the middle of her investigation on Kirkwood , she is put on leave by her boss and best friend . No longer in medical relations , Michael and Lauren decide to go on a date ; followed by sex . Michael has another dream that night , and wakes up strangling Lauren , and leaves . Lauren gets comfort from who she thinks is her roommate . Lauren later finds Ray dead in his bedroom , his throat cut . His double appears alive behind her and turns into the old man who had met her before . He knocks her unconscious . When she awakes , Ray ' s dead body is still in the room with her and it is revealed that something strange is on the back of her neck . She walks down the hall to find the old man naked , unconscious , and sitting at the dinning room table . His double walks in and reveals that he is a Zygon named Torlakh , who was sent to Earth on a special mission . He offers her the chance to be like him and she accepts , metamorphosing into a shape - shifting Zygon . The two go into public , where Lauren takes the body of a wealthy man . She uses his Visa cards to go shopping , and buys multiple sets of clothing , both for the wealthy man and her . Afterwards , she drives the man ' s Mercedes van back to his house , where his wife is waiting , worried about him being late . So worried , in fact , that she begins having sex with him . The next morning , Lauren is awoken by Torlakh , who takes her home . Lauren goes to " Andrew " ' s house , and tells him that she is now a Zygon . She soon realises that Torlakh has evil intentions , and calls the police . Torlakh , now able to hear Lauren ' s thoughts due to his helped metamorphosis of her , is one step ahead of her , and captures the , taking his shape to try to capture the two . Before he can , Lauren knocks him out and the pair steal his van and drive off . Torlakh orders the police man out of his other car . They go the the police headquarters , where Lauren is almost arrested for the death of her room mate by Officer Mcutcheon . She is able to knock him out and takes his form . Lauren goes in as Mcutcheon and tells some of the workers about the man who had been stalking her , and then leaves , dumping his body by the road . The two check into a hotel , where Michael begins to doubt if he can trust Laura anymore , and indeed who she really has become . He walks out on her , and thinks to himself on the rooftop . Torlakh comes to him and is able to convince him to work with him again . Torlakh sneaks him into an electronics plant . There Torlakh explains . The two of them had been left on earth 18 years prior to complete a mission , to make the Earth warmer . They went around the world and opened the carbon in electronic plants , thus polluting the world . In about 150 years the Zygon fleet would pass by the Earth and the two would hand the planet over to it . Laura arrives to tell Michael that he doesn ' t have to live like this , and that there is more to life . Reunited , the two find the bodies of the real Michael Kirkwood and Bob Calhoun . They remove the two ' s neck pieces , and move them to the van . In extreme pain from the removal of the pieces , Torlakh temporarily reverts to Zygon form , where he tries to kill Lauren as she puts the two bodies in the van . Lauren and Michael / Kritakh escape to the hospital where Lauren worked , with the comatose bodies of the real Michael and Bob . Lauren offers to apply Kritakh ' s neck piece to the body of Bob , allowing Kritakh to live as Bob ( who was a convicted killer ) while setting the innocent Michael free . Kritakh , uneasy about the prospect of being affected by murderer Bob ' s mind but also about continuing to take advantage of the innocent Michael , agrees . He attaches his neck piece to Bob , metamorphoses into Bob ' s form , and they kiss . Lauren finds herself uneasy at kissing " Bob , " so Kritakh retakes the shape of Michael and leaves with Bob ' s body . A Zygon in the shape of Lauren sets up a video camera in the hospital and murders Lauren ' s colleagues in view of it , framing her for the killing . The Zygon then shifts back into the shape of Bob and finds the real Lauren , throwing her the gun used in the murder . Lauren , now a wanted murderer , flees . Lauren returns to her room surrounded by old photos , thinking about the life she ' s lost . " Bob " shows up , offering to join forces with her and hunt together as Zygons . Lauren doesn ' t know whether " Bob " is Torlakh or a now - corrupted Kritakh , and " Bob " proclaims it doesn ' t matter . As " Bob " tauntingly takes Lauren ' s own form , Lauren shoots and kills the Zygon . Lauren later watches from a distance as the authorities collect " her " dead body from a park , and disappears down a crowded street . Story notes . Filming locations . " to be added " Production errors . " to be added " Continuity . " to be added "