Slitheen family

The Slitheen were a family of Raxacoricofallapatorian criminals. The Slitheen were rivals (and "cousins") of the Blathereen family, cousins of the Rackateen family and descendants of the Slavereen who were descended from the Changleen family, the earliest descendants of the Huspick Degenerate. They were one of the oldest families on the planet. (REF: Doctor Who: The Visual Dictionary)

Early History
The Slitheen were from Raxacoricofallapatorius originally, and bribed their way into government. Their rule crashed the planet's economy and eventually the population rose up against them. (SJA: The Gift) Exposed, shamed, and arrested en masse in the Great Purge of Yon:556, the entire family was tried and found guilty in perpetuity and given the death sentence. Many of the Slitheen fled justice, but the family continued to be hunted down by the Blathereen, Judoon and the Wrarth Warriors. (SJA: Revenge of the Slitheen, REF: Doctor Who: Monsters and Villains)

In 102, the Slitheen were among the factions who joined the Alliance. They came to Stonehenge and helped imprison the Eleventh Doctor in the Pandorica in order to save the Universe. (DW: The Pandorica Opens) When the plan failed, they were turned to dust and removed from the universe along with the rest of creation. They were returned when the Doctor managed to "reset" the universe. (DW: The Big Bang)

20th century
The Slitheen were operating in Mongolia in 1952. (VG: The Last Dalek)

21st century
In March 2006 they disguised themselves as various Humans holding leadership positions and attempted to seize control of the UK government in an effort 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. This attempt was foiled by the Ninth Doctor and his allies and all but one of the Slitheen were killed by Mickey Smith with a missile. (DW: Aliens of London, World War Three)

Later the same year, in September, Blon Fel-Fotch Passameer-Day Slitheen, one of their surviving members, managed to get herself elected Mayor of Cardiff, and tried to abuse her position in an attempt to blow up Earth by destroying a local nuclear reactor. The Cardiff Space-Time Rift would amplify the explosion so it would not only destroy Earth but enable her to escape the planet. This effort was also foiled by the Doctor and his allies. Blon was reverted into an egg by the heart of the TARDIS and returned to her home planet to be given a second chance at life. (DW: Boom Town)

In September 2008, another branch of the family took over a building company called Coldfire Construction 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 died. Korst Gogg Thek Lutiven-Day Slitheen, a young Slitheen survived, but not his father. (SJA: Revenge of the Slitheen) Later that year, he teamed up with two other adult Slitheen to seek revenge and make the Moon crash into Earth. (SJA: The Lost Boy) Torchwood Three knew of at least one of these events. (DW: The Stolen Earth)

At some point in 2009, a member of the family took the body of Ambassador Rahnius of the Galactic Alliance and attempted to steal K9 from Sarah Jane. (SJA: From Raxacoricofallapatorius With Love) Later, two more Slitheen would attempt to crush the Earth into a giant diamond; they were thwarted and captured by two Blathereen, who sentenced them to death. (SJA: The Gift)

In September 2009 a Slitheen tried to kill Sarah Jane with a bomb, but it was deactivated by K9. Clyde splashed the Slitheen with a bucket of vinegar, destroying it. (SJA: The Nightmare Man)

In late 2010, two Slitheen were hypnotised by the Krulius for his army of alien slaves to attack Sarah Jane's house. Clyde used a toy gun filled with vinegar to kill an attacking Slitheen. When he defeated several other aliens, the surviving Slitheen regrouped with the army and the Krulius ordered them to retreat. (WC: Defending Bannerman Road)

By 2012, Henry van Statten possessed a Slitheen arm, (DW: Dalek) apparently from Mongolia. (VG: The Last Dalek)



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. (NSA: Snowglobe 7)

Post-21st Century
After these attempts, their fortunes started to wane. They were put out of business by the Blathereen, who 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 Ninth Doctor. After the death of Don Arco, they stole the surviving warp-hole technology to rebuild their fortune. (NSA: The Monsters Inside)

By the 347th century, the family were still exiled from Raxacoricofallapatorius, although they expected a reappraisal in the coming 1000 years. They were also involved in the Platonic War, being among those defeated by the Humans. As a form of revenge, they travelled back to an early point in human history, when Greece was facing famine. They gave them food, in exchange asking for champions to fight for them. The Slitheen were actually running a temporal tourist tour, with aliens coming to see the sites of future monuments and with the Human fighters being killed for their entertainment. Their eventual plan was for the Humans to become too dependent on them, never develop technology and never develop any advanced civilisation. The Tenth Doctor and June tried to stop them peacefully, but instead the native Greeks fought back, destroying their time travel technology and throwing the whole organisation into chaos. Mamps, Cosmo and Leeb Slitheen escaped, but were trapped in the past. When their time-travel package tour appeared to kill a tourist, they were taken to court and bankrupted, with police being sent back to capture Mamps, Cosmo and Leeb. (NSA: The Slitheen Excursion)

Branches

 * The Passameer-Day Branch
 * The Lutiven-Day Branch
 * The Heppen-Bar Branch
 * The Hangle-Wang Branch



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 PC Strickland. (DW: Aliens of London / World War Three)
 * 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 Nathan Goss (SJA: The Lost Boy)
 * Florm Rox Fey Fenerill-Slam Slitheen posed as the Coldfire Construction secretary Janine. (SJA: Revenge of the Slitheen)
 * Dat Tex Fine Slitheen posed as Jay Stafford. (SJA: The Lost Boy)
 * Bioo Goo Von Bar Slitheen posed as Heidi Stafford. (SJA: The Lost Boy)
 * Ecktosca Fel-Fotch Heppen-Bar Slitheen was captured on Justicia. (NSA: The Monsters Inside)
 * Dram Fel-Fotch Heppen-Bar Slitheen was also captured on Justicia. (NSA: The Monsters Inside)
 * Callis Fel-Fotch Heppen-Bar Slitheen broke into Justicia to rescue Ecktosca and Dram. (NSA: The Monsters Inside)
 * Costmato Fel-Fotch Hangle-Wang Slitheen was a member of the family operating in 1500 BC Greece. (NSA: The Slitheen Excursion)
 * Mamps Fel-Fotch Hangle-Wang Slitheen was another member of the family operating in 1500 BC Greece. (NSA: The Slitheen Excursion)
 * Leeb Fel-Fotch Hangle-Wang Slitheen was another member of the family operating in 1500 BC Greece. (NSA: The Slitheen Excursion)
 * Hisk Fel-Fotch Hangle-Wang Slitheen was another member of the family operating in 1500 BC Greece. (NSA: The Slitheen Excursion)
 * Klov Dreb Fotch Passameer Day Slitheen III sneaked aboard The Doctor's TARDIS. (WC: Who Ate All the Biscuits?)

Unnamed

 * An unnamed member of the Passameer-Day Slitheen posed as Oliver Charles and General Asquith. (DW: Aliens of London / World War Three)
 * An unnamed member of the Passameer-Day Slitheen posed as RAF Group Captain Tennant James. (DW: Aliens of London / World War Three)
 * An unnamed member of the Passameer-Day Slitheen posed as Ewan McAllister, Deputy Secretary for the Scottish Parliament. (DW: Aliens of London / World War Three)
 * An unnamed member of the Passameer-Day Slitheen posed as Sylvia Dillane, chairman of the North Sea Boating Club. (DW: Aliens of London / World War Three)
 * A unnamed Slitheen was captured by the Graske and replaced by a changeling. When it broke free from its prison it chased the Graske but was later returned to where it came from. (DW: Attack of the Graske)
 * In Glune Fex Fize Sharlaveer-Slam Slitheen's plan, several Slitheen worked in various Coldfire Construction Sites across the world, When Glune was killed, Kist Magg Thek Lutiven-Day Slitheen told them to transport to Park Vale School but when the machine started to malfunction, the Slitheen escaped and abandoned Kist, his son Korst and Florm. (SJA: Revenge of the Slitheen)
 * A Slitheen posed as Ambassador Rahnius of the Galactic Alliance. (SJA: From Raxacoricofallapatorius With Love)
 * An adult and child Slitheen worked together in an attempt to compress Earth into a gigantic diamond, only for the two to be captured by the Slitheen-Blathereen. (SJA: The Gift)
 * A Slitheen, whose skin was a darker green then usual, attempted to blow up Sarah Jane and Luke Smith, but was killed when Clyde Langer threw a bucket of vinegar at him. (SJA: The Nightmare Man)

Cultural Details
The Slitheen placed great importance to hunting, including 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) When one or a group of Slitheen found themselves in a confrontation with multiple individals, a common tactic was to grab one of them by the neck and threaten to kill them unless the others followed their demands. (DW: Boom Town) (SJA: The Lost Boy, The Gift) The Slitheen drank Wullagula. (NSA: The Slitheen Excursion)

Technology
The Slitheen had 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 side effect: 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) In late 2008, 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 wasn't always initially used (SJA: From Raxacoricofallapatorius With Love, The Gift), but would remain the standard until at least 2501. (NSA: The Monsters Inside)


 * It is unclear whether the improved skin suits are artificially created, or if humans still need to be killed and their skins obtained.

In the 347th century, the Slitheen had molecular repurposing devices, remotely controlled ships and Time travelling technology stolen from the Navarinos. (NSA: The Slitheen Excursion)

Minor References

 * Rose wondered if the newly regenerated Doctor was a Slitheen. (DW: Children in Need Special)
 * Rose remarks that the Abzorbaloff looked "a bit Slitheen", and he claims to come from their twin planet, Clom. (DW: Love & Monsters)
 * The Tenth Doctor asked Donna Noble if Lance Bennett was "A bit overweight with a zip round his forehead". (DW: The Runaway Bride)
 * The Journal of Impossible Things featured drawings of the Slitheen, with a caption saying "it's always for the money". (DW: Human Nature/The Family of Blood)
 * The Tenth Doctor referred to the Slitheen when Martha Jones recalled the earthquake in Cardiff. (DW: Utopia)
 * Jack Harkness congratulated Sarah Jane Smith on her defeats of the Slitheen. (DW: The Stolen Earth)
 * The Tenth Doctor compared noisy snoring to a Slitheen gargling. (TDL: The Colour of Darkness)
 * Luke Smith told Sarah Jane, Clyde and Rani that his friends at the University of Oxford lived off baked beans and curry, Clyde remarked that it must be like living with the Slitheen. (SJA: The Vault of Secrets)

Behind the scenes

 * Of all the aliens created for the revived series, the Slitheen have been featured the most, having appeared in six television stories, two books and one short story.
 * The Slitheen are the only aliens from the main series to have appeared more times on-screen in a spin-off show, having been featured in only four episodes (including the cameo in The End of Time) of Doctor Who, yet appearing in six episodes (and one Comic Relief special) of The Sarah Jane Adventures.