Before sealing off the rooms, the Doctor confronts the Slitheen and learns that they are a family rather than a race, and they are not invading Earth, but rather raiding it for some commercial purpose.

Complying, the Doctor helps Mickey to hack online into the controls of the Royal Navy HMS Taurean, a Trafalgar class submarine, to fire a non-nuclear missile at 10 Downing Street, where all the Slitheen conspirators are now gathered.

The Slitheen are caught in the explosion when the missile hits.

The Slitheen are a family of massive, bipedal extraterrestrials from the British science fiction television series Doctor Who and are adversaries of the Doctor.

The Slitheen are a ruthless criminal sect whose main motivation is profit.

When the Slitheen are in their skin suits they fart loudly, they call this the gas exchange.

Raxacoricofallapatorians are vulnerable to acetic acid, which reacts explosively — and fatally — with their bodies, which makes Slitheen allergic to vinegar, ketchup and Coca-Cola.

When the Ninth Doctor and Rose are arrested in the Justicia System in the year 2501, the Doctor shares a cell with Dram Fel-Fotch and Ecktosca Fel-Fotch Happen-Bar Slitheen, who claim that after the Earth incident, the remnants of the family went bankrupt and had become historians.

When the Doctor and Rose defeat an attempted Blathereen takeover of the system, the Slitheen are pleased to see they can once again become the profit-holders of their race.

The Slitheen names mentioned in " Aliens of London " and " World War Three " are:

The Slitheen family also reappeared in several episodes in The Sarah Jane Adventures series, as well as cameo appearances in later Doctor who Episodes.

As well as a reappearance in the episodes " Boom Town ", and " Attack of the Graske " the Slitheen also return in the BBC books The Monsters Inside along with another family of the same race, called the Blathereen, and The Slitheen Excursion.

They also appear in The Sarah Jane Adventures episodes " Revenge of the Slitheen ", " The Lost Boy " and " From Raxacoricofallapatorius with Love ".

The Slitheen space ship from " Aliens of London " was also seen in a flashback in the same episode.

" A Fact File book about the Slitheen has also been released.

The bragging match between Sarah and Rose also references other stories: Sarah has met the Daleks, " lots of robots ", anti-matter monsters, mummies, dinosaurs, and the Loch Ness Monster, whereas Rose has met ghosts, " Slitheen in Downing Street ", the Dalek Emperor, gas-masked zombies, and a werewolf.

A Slitheen appears briefly in the Tenth Doctor novel The Nightmare of Black Island by Mike Tucker, created from Rose's memories, along with a Dalek and the Nestene Consciousness.

On television, he has played Baraquel, Sariel and Araquiel in Sky One's Hex season 2, as well as a number of characters in the 2005 series of Doctor Who: Blon Fel-Fotch Passameer-Day Slitheen in " Aliens of London " and " World War Three " ( and briefly in " Boom Town "), lead Auton in " Rose ", the Anne Droid in " Bad Wolf " and " The Parting of the Ways ", Trine-E in " Bad Wolf ", and Lute of the Forest of Cheem in " The End of the World ".

In " World War Three ", when confronted by a group of Slitheen, the Doctor threatens to " triplicate the flammability " of a bottle of port wine with the sonic screwdriver, though one of the Slitheen realises he is bluffing.

Also, in the new Doctor Who series, Blon de Slitheen survives the bombing of 10 Downing Street ( Series 1, Episode 5: " World War Three ") by teleportation to the Isle of Dogs ( Series 1, Episode 11: " Boom Town ").

Following from the cliffhanger in " Aliens of London ", The Doctor being an alien allows him to survive the electrical pulse administered by the Slitheen Green, while Mickey Smith is able to push aside the police inspector who was advancing on Jackie Tyler.

The Doctor attempts to get the police, but by the time he has returned, the Slitheen have got back into their suits.

In the episode itself, a female Major in a United States military uniform, wearing a tag with the name " Frost " was among a group of " alien experts " killed by the Slitheen.

praised the character's development stating that " by the time he faces down a Slitheen in his apartment, armed only with a baseball bat ... you want him to become a regular companion.

Though the name " Slitheen " refers to a specific family, the term has been used by the Doctor and Rose to refer to the Raxacoricofallapatorian race in general.

The Slitheen disguise themselves by fitting into the skins of their victims, using compression fields created by a collar worn around their necks to squeeze their huge size into a slightly smaller space.

Some years after the events of " World War Three ", in Revenge of the Slitheen ( set in either 2008 or 2009 ) another group of Slitheen infiltrated a construction company with plans to turn off the Sun and destroy Earth by draining the world's energy.

After the Commander was killed by Maria Jackson, Luke Smith was able to trick the Slitheen into resetting their machinery, which then malfunctioned and exploded.

The Slitheen appeared in the New Series Adventures novel The Monsters Inside by Stephen Cole.

A member of the Slitheen was captured by the Graske in the mini-episode " Attack of the Graske ".

*" The Slitheen Excursion " ( New Series Adventures ) by Simon Guerrier

*" Revenge of the Slitheen " ( The Sarah Jane Adventures ) by Rupert Laight

Rose mentions that she and the Doctor have been to the Glass Pyramid of Sancleen, and to Justicia, which is the star system that they visit in the New Series Adventures novel The Monsters Inside by Stephen Cole ( where they encounter other members of the Slitheen family, as well as other members of the same race, the Blathereen ).

The phrase " Slitheen in Downing Street " was later used in Revenge of the Slitheen by Sarah.

In the episode commentary, Davies said that an early draft of the script called for the role of the Ood to be filled by the same species as the Slitheen.

* in Doctor Who's first series after its revival, episodes 4-5 and 11 featured the alien Slitheen family of the planet Raxicoricofallapatorius, which were said to be Calcium-based life forms, causing them to be blown up in contact with vinegar.

In Doctor Who and the Sarah Jane Adventures, the Slitheen disguise themselves in human skin suits to infiltrate human society.

The Autons returned in the 2010 episode, " The Pandorica Opens ", allying with the Atraxi, Blowfish, Chelonians, Daleks, Drahvin, Draconians, Sontarans, Cybermen, Haemogoth, Judoon, Slitheen, Silurians, Sycorax, Terileptils, Hoix, Roboforms, Uvodni, Zygons and Weevils to trap the Eleventh Doctor.

As the Doctor, Rose Tyler and their new friend Harriet Jones battle the murderous Slitheen while trapped in 10 Downing Street, the Doctor realises that the fate of the Earth rests on Rose's boyfriend, Mickey.

The Doctor gives Mickey instructions on how to log into the UNIT website on his computer, and uses that to determine that the Slitheen ship is presently in the North Sea, transmitting some signal that Mickey attempts to decode.

The Doctor realizes that the Slitheen actually plan to fire the weapons against other countries in order to start World War III so they can sell the Earth's radioactive remains as a fuel source, which they have already begun advertising through the signal Mickey has decoded.

The museum's display items feature the arm of a Slitheen ( Raxacoricofallapatorian ) from " Aliens of London ", which Rose recognises, and something that the Doctor refers to as " An old friend, well, enemy ... " – a Cyberman head ( from Revenge of the Cybermen, but the label on its display case references The Invasion ).

In " Boom Town ", Mickey later meets up with the Doctor, Rose and new companion Captain Jack ( John Barrowman ) in Cardiff, where he helps them foil a Slitheen plot.

Before the Slitheen could receive the launch codes, the Ninth Doctor arranged for a Harpoon missile to demolish 10 Downing Street, ending the scheme and killing all but one of them who managed to escape through an emergency teleport.

Rose mentioned the Slitheen Parliament of Raxacoricofallapatorius in " The Christmas Invasion " ( though her impromptu speech was a pastiche of phrases she's picked up on her travels with the Doctor ).