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Slitheen

Slitheen is a biology topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Slitheen rather than just read about it. In short: The Slitheen are a fictional crime family from the British science fiction television series Doctor Who. They belong to a species known as the Raxacoricofallapatorians, an alien lifeform originating from the planet Raxicoricofallapatorius.

Slitheen — main illustration
Slitheen — illustration

Key takeaways

  • Slitheen belongs to biology; place it in that map before memorising details.
  • Learn the definition first, then one example that makes the definition concrete.
  • Connect Slitheen to a quantity you can measure, compute or draw — that is where exam questions come from.
  • Reproduce the core statement of Slitheen from memory before moving on to harder problems.

Reference excerpt

The Slitheen are a fictional crime family from the British science fiction television series Doctor Who. They belong to a species known as the Raxacoricofallapatorians, an alien lifeform originating from the planet Raxicoricofallapatorius. The Slitheen can disguise themselves as humans by hiding in skinsuits, though the technology they use results in them farting excessively while in disguise. The Slitheen first appeared in the first series of the show's 2005 revival in the two-part story "Aliens of London" and "World War Three", where they attempt to destroy Earth to sell its remains for profit. A single Slitheen, named Blon Fel-Fotch Pasameer-Day Slitheen (Annette Badland), escapes the subsequent destruction of the family at the end of "World War Three", and reappears later in the series in the episode "Boom Town", where she becomes Lord Mayor of Cardiff and attempts to escape the planet by destroying Earth. Subsequently, the Slitheen recur in spin-off media such as comics, books, and audio dramas in Doctor Who. They also appear as major recurring antagonists in the spin-off television series The Sarah Jane Adventures. The Slitheen were created by Russell T Davies while writing "Aliens of London" and "World War Three", being inspired to write a crime family from various sources. They were conceived to be appealing to children and had several aspects of their character designed around this fact. The Slitheen were portrayed via physical costumes, though partially portrayed by CGI in certain shots. During filming of their debut episodes, Davies was impressed by the performance of Badland as Blon resulting in Davies bringing her back for "Boom Town" to portray Blon following the events of the two-parter. Subsequently, Davies pitched the concept for spin-off series The Sarah Jane Adventures with the idea of Sarah Jane Smith fighting the Slitheen. This inclusion was cited to be because they were popular with children and would help attract viewers of Doctor Who to The Sarah Jane Adventures. The Slitheen were initially criticised by critics, with many disliking the childish humor and lack of narrative weight they were treated with, however Blon's return in "Boom Town" was highlighted for providing greater depth to the family, with their later character depth receiving analysis. The feasibility of the family in real life has also been explored and analysed.

Appearances

Doctor Who

Doctor Who is a long-running British science-fiction television series that began in 1963. It stars its protagonist, The Doctor, an alien who travels through time and space in a ship known as the TARDIS, as well as their travelling companions. When the Doctor dies, they are able to undergo a process known as "regeneration", completely changing the Doctor's appearance and personality. Throughout their travels, the Doctor often comes into conflict with various alien species and antagonists. The Slitheen are a criminal family of Raxicoricofallapatorians, a species who hail from the planet Raxicoricofallapatorius. They are capable of disguising themselves as humans via skin suits, but the process causes a buildup of "gas exchange", causing the Slitheen to fart while in disguise. They are susceptible to vinegar due to being calcium-based lifeforms, causing them to explode on contact with vinegar. The Slitheen first appear in the 2005 episodes "Aliens of London" and "World War Three". In the episodes, the Slitheen have infiltrated the Government of the United Kingdom, replacing many key political figures. They crash a spaceship, piloted by a pig, into Big Ben, causing a state of world panic. The family wished to use this paranoia to allow the United Nations to let the government utilise its nuclear arsenal against a supposed alien threat; with this nuclear arsenal, the Slitheen will destroy the planet, selling the leftover chunks as spaceship fuel. The Ninth Doctor and his allies are able to arrange for a Harpoon missile to demolish 10 Downing Street, killing all of the Slitheen and averting the crisis. A single Slitheen from the invasion survived. Appearing in the 2005 episode "Boom Town", Blon Fel-Fotch Pasameer-Day Slitheen assumed the identity of Margaret Blaine of MI5, and slowly worked her way up to the position of Lord Mayor of Cardiff. Blon planned to channel nuclear power into an alien device, which would allow her to escape the planet at the cost of the planet's destruction. Blon cornered the Ninth Doctor and his allies in the TARDIS, at which point she was exposed to the "heart" of the ship. This reverted her back to an egg, which the Doctor took back to her home planet so she could have a chance at a peaceful life. Following this, a Slitheen appeared in the 2005 mini-episode "Attack of the Graske", in which one is captured by an alien called a Graske. It is released from its prison and attacks the Graske.

Spin-off media The Slitheen would appear in several pieces of spin-off media for the series. They appear in the novel The Monsters Inside, in which a pair of them ally with the Doctor to help stop an invasion attempt by the Blathereen. The 2009 novel The Slitheen Excursion depicts the Tenth Doctor attempting to foil a Slitheen plot in ancient Rome. Big Finish audio dramas Death on the Mile and The Taste of Death see further plots by the Slitheen, with the former being thwarted by the Doctor's friend Lady Christina de Souza, while the latter is stopped by the Tenth Doctor. Blon would re-appear in the 2019 audio drama Sync, which depicted her prior to the events of "Boom Town". Blon investigates a crashed spaceship in the hopes of leaving Earth, finding Suzie Costello at the site. The two work together to stop an alien race called the Elyrians, and the two part ways. She also appeared in the 2017-2018 comic strip A Confusion of Angels, in which she is shown following the events of "Boom Town". Having joined an intergalactic police body known as the Shadow Proclamation, she aids the Twelfth Doctor against robots known as the Heavenly Host.

… excerpt ends here. Continue reading the full article.

Illustrations

Slitheen illustration
Slitheen: A Slitheen, as seen on display at the Doctor Who Experience
A Slitheen, as seen on display at the Doctor Who Experience
Slitheen: A Slitheen, as it appears at the Doctor Who Experience
A Slitheen, as it appears at the Doctor Who Experience
Slitheen: Annette Badland (pictured) portrayed Blon Fel-Fotch Pasameer-Day Slitheen in the series.
Annette Badland (pictured) portrayed Blon Fel-Fotch Pasameer-Day Slitheen in the series.

Worked examples

Example 1 — a first encounter with Slitheen

Start with the simplest possible case. Write down what Slitheen claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In biology, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Slitheen before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Slitheen ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Slitheen

In research
Slitheen appears in biology research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry
Engineering practice reuses Slitheen in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom
Slitheen is common in secondary-school and first-year university syllabi. It links to neighbouring topics Fictional characters with superhuman senses, Fictional characters with superhuman strength, Fictional criminals, so understanding it makes those chapters shorter.
In everyday life
Look for Slitheen outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.
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How to study Slitheen in 20 minutes

  1. Read the reference excerpt below once, without taking notes.
  2. Close the page and write down what Slitheen means in your own words.
  3. Compare your version with the excerpt and mark what you missed.
  4. Work through the three examples above with pen and paper.
  5. Explain Slitheen out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Slitheen in simple terms?

The Slitheen are a fictional crime family from the British science fiction television series Doctor Who. They belong to a species known as the Raxacoricofallapatorians, an alien lifeform originating from the planet Raxicoricofallapatorius.

Why does Slitheen matter?

Because it connects several biology ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Slitheen?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Slitheen.

Tags

  • Fictional characters with superhuman senses
  • Fictional characters with superhuman strength
  • Fictional criminals
  • Fictional extraterrestrial species and races
  • Fictional families
  • Fictional hunters
  • Fictional impostors
  • Fictional murderers
  • Television characters introduced in 2005
  • The Sarah Jane Adventures characters

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