Shadows of the Vashta Nerada ( video game ) Shadows of the Vashta Nerada was the fourth of five adventures in the . At the time of its release , it was marketed as the end of the first " series " , but it was ultimately followed by only one other game . Released as part of the 2010 Adventure Calendar , it was heavily marketed with a Christmas theme — despite the fact that it had only limited Yuletide content , largely confined to its closing scene . Synopsis . London , the 23rd Century : devastated by a plague of biblical proportions , the city has been consumed by Davy Jones ' Locker . Now the Doctor and his latest companion , Amy Pond , find themselves in a deep sea base . It is a research station designed to study the ruins and salvage some shrapnel of hope from the wreckage . A swarm of monstrous Vashta Nerada have invaded the facility with plans to feast on the crew . Can the Doctor and Amy survive ? Only you can decide . . . Plot . Act one . The Doctor and Amy have come under attack by a giant shark - like creature which batters the outside of the transparent conduits that link sections of the undersea base . They are forced to escape and are left with no option but to move on , as their way back to the TARDIS has been destroyed by the massive jaws of the monster . As they traverse the tunnels , they are stalked by the beast which is trying to break through . Arriving at the main building , Amy and the Doctor find one of the base ' s personnel , Martin Flanagan . Unfortunately , he is trapped in the area because a sentient computer named Jones will not let him in due to the quarantine . The Doctor manages to convince Jones to let them pass through a compromise after giving it recognition for its hard work ( something Jones has long wished for ) . Act two . Inside Poseidon 8 , they meet Oswald Fox and Dana Tanaka , who begin to explain the situation . The lights go out , and when Oswald and Dana begin to panic , the Doctor realises there is something else attacking Poseidon 8 : the Vashta Nerada . When the lights come back on , to the horror of his coworkers , Martin is found to be dead : there ' s nothing left of him but his diving suit and bones . The Doctor and Amy decide to go fix the generators so that they may keep the Vashta Nerada at bay , all the while avoiding the shark - like Zaralok that continues to stalk them ; it attempts to break through the glass , but it proves strong enough to withstand its blow . They arrive to the generator and are faced with two dead divers reanimated by the Vashta Nerada . They avoid them and the generator is turned back on , expelling the Vashta Nerada from the two bodies when the light is restored . The Doctor takes an environment status chip from one of the divers ' suits to have Jones analyse it . Jones detects that radiation is recorded in the status chip , but is unable to identify what kind it is as it has not records of such radiation . The Doctor deduce s that the reason is because it ' s Vortron radiation , a type of radiation caused by rifts in time that is not ordinarily found on Earth . Deciding to focus on curing the disease caused by the radiation , the Doctor asks Oswald to give them the access codes for parts of the base that are sealed off , to allow them to find the ingredients he needs to create a cure . Cracking under the stress of the situation , Oswald forbids the Doctor and Amy from doing so due to the danger posed by the Vashta Nerada . Oswald explains he plans to send the crew up to the surface in escape pods . However , this is actually a terribly bad idea : if the survivors are not destroyed by the Zaralok , they ' ll be fish in barrels for the Vashta Nerada in the darkened pods . However , this thought doesn ' t occur to Oswald . The Doctor and Amy convince Dana to give them the codes , letting them out into the corridors to find ingredients . Finding a series of vegetables recently harvested in the corridors , the Doctor concocts an antidote and gives one of the serums to Dana . Dana reveals another piece of information to the mysterious goings on : all these strange occurrences started with a mysterious flash of light . The Doctor uses the base ' s scanners to search the area for the source of the chaos , locating a nearby shipwreck - but it ' s no ordinary shipwreck . It ' s the famed US supply ship , the USS " Eldridge " , which was part of an invisibility project . The Time Lords attempted to stop the project , but failed when the ship fell through a wormhole . As an unintended result , the experiment caused the ship to bend the laws of physics and travel through time , the electromagnetic generator now acting as a gateway through time and space that brought both the Shark and the Vashta Nerada to Poseidon 8 . The Doctor also finds that there is an underground tunnel back to the TARDIS and prepares to leave with Amy and Dana to the " Eldridge " . However , Oswald threatens them into being arrested with a harpoon gun . He ties them up and leaves to launch the escapes pods with Dana . Using an escape trick he learned from Houdini , the Doctor gets untied and unties Amy . They use the secret passage and get back to the TARDIS . Act three . The Doctor pilots the TARDIS to the USS " Eldridge " and tells Amy they have to find the controls for the gateway and deactivate them as it is the only way to remove the Vashta Nerada and Zaralok from Poseidon 8 and return them to their own places in time . It ' s easier said than done as Vashta Nerada are on the " Eldridge " as well , animating the suits of the crew to go after them again . Too make matters worse , the giant shark has found them and is " still " trying to find a way in to eat them . Making their way through the ship , the Doctor and Amy outsmart most of the Vashta Nerada by luring them into chambers and flushing them away . Upon reaching the controls for the gateway , the Doctor and Amy find the room is full of half - broken machinery due to the ship ' s rough trip through time . Managing to navigate their way through a safe path , the Doctor and Amy reach the controls for the gateway . Undoing the damage the gateway has caused is now a race against time ; the Zaralok is ramming repeatedly against the glass to break into the ship for a meal . However , Amy and the Doctor throw the switches for the gateway , sending the shark back to whence it came along with the Vashta Nerada , also ending the radiation . Back on Poseidon 8 , Dana and Oswald are thankful for their help , with Oswald apologising for his actions and offering to let the Doctor and Amy join their Christmas feast of sea pumpkins . However , the Doctor and Amy are more than a little unwilling and secretly enter the TARDIS when Dana and Oswald have their backs turned . The sound of the TARDIS dematerialising makes Oswald and Dana turn around to see their saviours are taking off , much to their shock . " Rest to be added . " References . " to be added " Story notes . Promotion . " to be added "