Slitheen family

"Victory should be naked!"

- Jocrassa Fel-Fotch Passameer-Day Slitheen

The Slitheen Family were a family of Raxacoricofallapatorian criminals. The Slitheen were rivals (and "cousins") with the Blathereen family, descendants of the Huspick Degenerate and cousins of the Rackateen Family.

2000s
The Slitheen were from Raxacoricofallapatorius orginally, until they were given with the death sentence should they return. Following this, in the year 2006 they disguised themselves as various Humans holding leadership positions and attempted to seize control of the UK government and attempted to start a nuclear war. Their ultimate aim was to turn the Earth into a huge nuclear reactor pile and sell its remains off as starship fuel. (DW: Aliens of London, World War Three)

Blon, one of their surviving members, managed to get herself elected as Mayor of Cardiff, and tried to abuse her position to attempt to blow up Earth by destroying a local nuclear reactor. The Cardiff rift would amplify the explosion where it would not only destroy Earth but enable her to escape the planet(DW: Boom Town)

Later, another branch of the family took over a building company called Coldfire and attempted to achieve the destruction of the Earth by shutting down the Sun. This group of Slitheen were eventually defeated by Sarah Jane Smith and her friends. Though Sarah did not mean to kill them, several ended up dead. Korst Gogg Thek Lutiven-Day Slitheen, a young Slitheen survived, but not his father. (SJA: Revenge of the Slitheen) He later teamed up with two other adult Slitheen to seek revenge and make the Moon crash into Earth. (SJA: The Lost Boy) Torchwood 3 knew of at least one of these events. (SJA: The Stolen Earth)

Later 21st century
A group of Slitheen returned to Earth in the late 21st century with hostile intentions but went home after a short time. (TDA: Snowglobe 7)

Post-21st century
After these attempts, their fortunes started to wane. They were put out of business by the Blathereen, since they were cheaper and more effective. In the year 2501, Ecktosca and Dram discovered the activities going on in Justicia and attempted to take over the operations. They were captured, but later escaped with the help of the Doctor. After the death of Don Arco, they stole the surviving warp-hole technology to rebuild their fortune. (NDA: The Monsters Inside)



Named

 * Blon Fel-Fotch Passameer-Day Slitheen posed as Margaret Blaine. (DW: Aliens of London / World War Three, Boom Town)
 * Jocrassa Fel-Fotch Passameer-Day Slitheen posed as Joseph Green. (DW: Aliens of London / World War Three)
 * Sip Fel-Fotch Passameer-Day Slitheen posed as a Police Constable named Strickland. (DW: Aliens of London / World War Three)
 * Ecktosca Fel-Fotch Heppen-Bar Slitheen was captured on Justicia. (NDA: The Monsters Inside)
 * Dram Fel-Fotch Heppen-Bar Slitheen was also captured on Justicia. (NDA: The Monsters Inside)
 * Callis Fel-Fotch Heppen-Bar Slitheen broke into Justicia to rescue Ecktosca and Dram. (NDA: The Monsters Inside)
 * Kist Magg Thek Lutiven-Day Slitheen posed as Tim Jeffery. (SJA: Revenge of the Slitheen)
 * Glune Fex Fize Sharlaveer-Slam Slitheen posed as Greg Blakeman. (SJA: Revenge of the Slitheen)
 * Korst Gogg Thek Lutiven-Day Slitheen posed as Carl (SJA: Revenge of the Slitheen) and later as Nathan Goss (SJA: The Lost Boy)
 * Florm Rox Fey Fenerill-Slam Slitheen posed as the Coldfire secretary Janine. (SJA: Revenge of the Slitheen)

Unnamed

 * An unnamed member of the Slitheen posed as Oliver Charles and General Asquith. Other unnamed members posed as various other government officials, including RAF Group Captain Tennant James, Deputy Secretary for the Scottish Parliament Ewan McAllister and Chairman of the North Sea Boating Club Sylvia Delaine. (DW: Aliens of London / World War Three)
 * Two Slitheen posed as Jay and Heidi Stafford. (SJA: The Lost Boy)

Cultural details
The Slitheen placed great importance to hunting, which included the hunting of sentient prey. (SJA: Revenge of the Slitheen) They sometimes displayed joy at triumph by disrobing. (DW: World War Three) Blon said that the Slitheen used venom grubs to dispose of family members not willing to engage in criminal activities (DW: Boom Town)

Infiltration method
The Slitheen have developed a method of disguising themselves as humans by first obtaining the skin of a dead human -- referred to as a skin suit -- and compressing themselves into it. In order for this to work the human victim needed to be heavy set, and the compression had a sideffect: a gas exchange occurs which causes the disguised Slitheen to frequently expel gas with a sound similar to human flatulation. (DW: Aliens of London; SJA: Revenge of the Slitheen). Eventually, the skin suit technology was improved to allow Slitheen to assume a greater variety of human body types, and the gas-exchange issue was eliminated. (SJA: The Lost Boy)
 * It is unclear whether the improved skin suits are artificially created, or if humans still need to be killed and their skins obtained. Alan Jackson finds one of the Slitheen skin suits hung up on a peg, like a piece of clothing.

Minor references

 * In 2012, Henry van Statten's private collection in the Vault contained a severed Raxacoricofallapatorian arm. One of their compression fields was also saved and studied by him. (DW: Dalek, NDA: The Monsters Inside)
 * Rose remarks that the Abzorbaloff looked "a bit Slitheen", and he claims to come from their twin planet, Clom. (DW: Love & Monsters)
 * The Doctor asked Donna Noble if Lance Bennett was "A bit overweight witha zip round his forehead". (DW): The Runaway Bride
 * The Journal of Impossible Things featured drawings of the Slitheen, with a caption saying "its always for the money".
 * The Doctor referred to the Slitheen when Martha Jones recalled the earthquake in Cardiff. (DW: Utopia)

Behind the scenes

 * The 2008 Storybook features an illustration, unconnected to any of the stories, of the Tenth Doctor and Martha hanging onto a cable in a lift shaft while surrounded by Raxacoricofallapatorians; however, there is no context with which to determine whether or not these are Slitheen.
 * Of all the aliens created for the revived series, the Slitheen have been featured the most, having appeared in Aliens of London, World War Three, Boom Town, The Monsters Inside, Revenge of the Slitheen and The Lost Boy, as well as being referenced in The Runaway Bride, Utopia (TV story) and The Stolen Earth