Passameer-Day Slitheen

The Passameer-Day Slitheen were a branch of the Raxacoricofallapatorian criminal family Slitheen.

2000s
The Passameer-Day Slitheen like the rest of their were from Raxacoricofallapatorius orginally, the slitheen 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 with no chance of appeal. Many of the Slitheen fled justice, but the family continued to be hunted down by the Blathereen and Judoon. (SJA: Revenge of the Slitheen)

Following this, in March 2006 the Passameer-Day Slitheen 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, they crashed their spacecraft into the thames to hoax an alien invasion to make the UN give them the codes to nuclear weapons. They also had a bigger ship in orbit above the North Sea. 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 Doctor and his allies. All of them, apart from Blon Fel-Fotch Passameer-Day Slitheen were killed when 10 Downing Street was destroyed by a missile. (DW: Aliens of London, World War Three)

Later the same year, in September, Blon, the last surviving member, 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 the Rift would amplify the explosion where 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 then regressed back into an egg by the Tardis so she could have a second chance at life, the Doctor then the egg to Raxacoricofallapatorius and gave it to a family who adopted her.(DW: Boom Town)

Legacy
Later, in September 2008, another branch of the family tried to avenge the Passameer-Day Slitheen. They 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 ended up dead. Korst Gogg Thek Lutiven-Day Slitheen, a young Slitheen survived, but not his father. (SJA: Revenge of the Slitheen) In February 2009, he teamed up with two other adult Slitheen to seek revenge and make the Moon crash into Earth. (SJA: The Lost Boy)

At some point in either early 2010, a young 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 on, 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)

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)

The attempt of the Passameer-Day Slitheen to reduce the Earth to molten slag and then sell it would prove to be an important moment in the history of the Slitheen family, it was a crushing failure to become rich and several attempts were made to make profit on Earth again but none of them succeded. (SJA: Revenge of the Slitheen,The Lost Boy,From Raxacoricofallapatorius with Love,The Gift). These failures played a vital role in the downfall of the Slitheen and place in the shadow of their successful cousins and enemies the Blathereen family.

They weren't able to gain an advantage until 2501 after the disasterous failure of the Blathereen to turn the Justicia system as a planet destroyer, resulting in the deaths of many Blathereen, the Slitheen then stole their Warp-Hole technology and prepared to return to their former glory. (NSA: 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 PC Strickland. (DW: Aliens of London / World War Three)

Unnamed

 * An unnamed member of the Passameer-Day Slitheen posed as Oliver Charles and General Asquith, others posed as RAF Group Captain Tennant James, Deputy Secretary for the Scottish Parliament Ewan McAllister and the chairman of the North Sea Boating Club Sylvia Delaine. (DW: Aliens of London / World War Three)