Graske The Graske were sentient humanoid s known for their mischievous behaviour . Biology . The Graske were small compared to human s and had pebbly brown skin and three tentacle - like features on their heads . They had difficulty speaking other languages , using odd grammar and curt sentences . ( TV : " Whatever Happened to Sarah Jane ? " , " Music of the Spheres " ) Individuals were physically similar , leading Mr Smith to suggest that the Graske may have been a clone species like the Sontaran s . ( TV : " SJAF " 1 ) They come from the planet Griffoth . ( TV : " SJAF " 1 ) The Groske were related to the Graske , though blue in colour . ( TV : " Death of the Doctor " ) Technology . Krislok used a snare cable to take people out of time and put them into Limbo . A snare gun could reverse the process , putting them back in time and space and restoring their timeline . They also used snare cables for capture and a teleportation device for teleportation . ( TV : " Whatever Happened to Sarah Jane ? " , " SJAF " 1 ) Graske also had conventional spaceships for travel . Krislok was also capable of disguising himself as a human child . ( TV : " The Temptation of Sarah Jane Smith " ) Furthermore the Graske created Changeling s which were controlled by the Graske and mimicked an individual . They almost looked the same as the original . ( WC : " " ) History . Some time during the Victorian era , a Graske was found going through the Paternoster Gang ' s house . It tried to invade Earth slowly by swapping Graskes ' with humans . Jenny had already been swapped , but Vastra knew something was wrong with her . Strax shot the Graskes ' with their own snare - cable gun , to which they disappeared and Jenny appeared in their place . ( PROSE : " The Pest of Paternoster Row " ) In 1996 , a Graske was responsible for the disappearances of three students in Carlisle . The Graske was found at a nightclub and killed . Its corpse was taken taken to the Leamington Spa Lifeboat Museum . ( GAME : " Security Bot " ) Several years before Krislok met the Trickster , there was " some Graske activity " on Earth . Krislok became a slave to the Trickster after the Trickster agreed to save its life during what would have been a fatal crash . ( TV : " The Temptation of Sarah Jane Smith " ) He was used by the Trickster to remove Sarah Jane Smith and later Maria Jackson from time . The Graske succeeded both times , but Maria managed to escape into 1964 . The Graske recaptured her again , but then got sent to capture Alan Jackson . Alan fought the Graske and beat it , forcing it to tell him where his daughter went . The Graske later escaped by wriggling its way out of its bonds . ( TV : " Whatever Happened to Sarah Jane ? " ) Along with twenty - six other planets , Griffoth was stolen by the Dalek s and taken to the Medusa Cascade in 2009 , ( TV : " SJAF 1 " ) as part of Davros ' s plan to detonate the reality bomb . This was stopped by Donna Noble , and Griffoth and the rest of the planets were subsequently back to their proper places . ( TV : " Journey ' s End " ) Later , the Trickster had Krislok pose as a small boy to lure Sarah Jane into a trap set at the time of her parents ' death . In the alternative timeline created , the Graske was charged with enslaving humanity to do the Trickster ' s bidding . Clyde Langer and Rani Chandra convinced Krislok to help them , and they gave him the puzzle box to protect him should the Trickster seek revenge . ( TV : " The Temptation of Sarah Jane Smith " ) A Graske invaded the Doctor ' s TARDIS and used a space portal to travel to Earth . The Tenth Doctor shut the portal and sent the Graske back to where it came from . ( TV : " Music of the Spheres " ) One Graske was captured by the Krulius and stored in a data - pod . The Krulius later used his digital bio - converter to upload the Graske ' s bio data onto the internet . There it was found by Mr Smith , Rani Chandra and Clyde Langer who sent the Graske back to his home planet . ( COMIC : " Monster Hunt " ) Another Graske was kept at the Doloth Star Base . When the Judoon caught the Krulius all his captured aliens were set free . However the Krulius had managed to take clone cell samples of his former captured aliens with him , which allowed him to grew perfect copies of these aliens . ( COMIC : " Return of the Krulius " ) In June 2010 , three Graske were eating at Big Paulie ' s Sausages on Earth . ( PROSE : " The Forgotten Army " ) A Graske was seen at the bar where the Tenth Doctor came to visit Jack Harkness one last time before his regeneration . ( TV : " The End of Time " ) In late 2010 , a Graske took part at the army of alien slaves led by the Krulius to attack Sarah Jane ' s house . When Clyde defeated several of the aliens , the Graske regrouped with the army and the Krulius ordered them to retreat . Sarah Jane thought that the aliens were under some kind of hypnothic influence . ( COMIC : " Defending Bannerman Road " ) Undated events . The Graske once infested a nunnery . ( COMIC : " The Eye of Ashaya " ) Behind the scenes . " Attack of the Graske " . This wiki does not consider the technical debut of the species , NOTVALID : " Attack of the Graske " , as a . This is because it has multiple endings , which we cannot qualify through any mechanism which is the " correct " or " canonical " one . As a result , the debut of the Graske in the " Doctor Who " universe is the two part " Sarah Jane Adventures " story " Whatever Happened to Sarah Jane ? " . In " Attack of the Graske " , the Graske were shown to be conquerors from the planet Griffoth , though unlike other species they did not take a planet by force . They would instead use their changeling s to systematically replace the inhabitants of the planet . This process was quick , with the Graske replacing the individual with the changeling in seconds . In the game , one Graske attempted an invasion of Earth , stealing people from various Christmas es from across time . An unseen companion of the Tenth Doctor controlled by the player at home could choose from two endings to the game : either freezing the captured inhabitants , or safely returning them home .