Within the house, Rutans and Sontarans come into conflict with each other, a conflict which is resolved when the Doctor decides to give each of the two doomsday weapons to both sides, revealing that he reprogrammed one of them to target Rutans, and nobody knows whose weapon will target who.

If given time travel, the Sontarans will become unstoppable.

The Sontarans appear in the " Doctor Who: The Adventure Games " episode, The Gunpowder Plot.

Shakedown marks the only occasion in which the Sontarans and their Rutan foes appear on screen together, and was adapted into a Virgin New Adventures novel.

The Sontarans also briefly appear in The Eight Doctors, sent to the Eye of Orion by an agent of the Celestial Intervention Agency to kill the Fifth and Eighth Doctors.

In " The Pandorica Opens ", some Silurians appear in 102 AD alongside various alien enemies of the Doctor ( including alien Daleks, Sontarans, Nestenes and other species ) to imprison the Doctor in the mythical " Pandorica " in order, as they see it, to save the universe from him.

In the full-length New Series Adventures book The Taking of Chelsea 426, by David Llewellyn, the Rutans again appear alongside their enemies the Sontarans.

* This serial marks a number of firsts: the first appearance of both Sarah Jane Smith and the Sontarans ; the first mention of the name Gallifrey, in reference to the Doctor's home planet ; and the Rutans who would later appear in Horror of Fang Rock.

The Sontarans are a fictional extraterrestrial race of humanoids from the British science fiction television series Doctor Who, and also seen in spin-off series The Sarah Jane Adventures.

The Sontarans depicted in the series have detached, smug personalities, and a highly developed sense of honour ; on multiple occasions, the Doctor has used his knowledge of their pride in their species to manipulate them.

All the Sontarans depicted in the television series have monosyllabic names, many beginning with an initial ' st ' sound ( e. g. Styre ( The Sontaran Experiment ), Stor ( The Invasion of Time ), Stike ( The Two Doctors ), Staal ( The Sontaran Stratagem ), and Strax ( A Good Man Goes To War ); exceptions are Linx ( The Time Warrior ), Varl ( The Two Doctors ) Skorr ( The Sontaran Stratagem ) and Kaagh ( The Sarah Jane Adventures )).

Sontarans reproduce asexually and all the Sontarans depicted in the television series are of one gender ( male ).

In both the classic and new series, Sontarans are depicted using spherical or semi-spherical single-occupant spacecraft known as capsules.

The Sontarans make their return in the revived series in the episodes " The Sontaran Strategem " and " The Poison Sky ", with Christopher Ryan playing the Sontaran leader, General Staal of the Tenth Sontaran Battle Fleet and also being the story arc's primary antagonist.

The origins of the Sontarans have not been revealed in the television series.

One novel in the series, Shakedown, was in fact a novelisation of an independent video production that had featured the Sontarans.

She left the series in an emotional farewell scene in 1964 at the conclusion of The Dalek Invasion of Earth, but briefly returned for the 20th anniversary special The Five Doctors in 1983 and also appeared in the 30th anniversary charity special Dimensions in Time and ( as a different character ) the independent Doctor Who spin-off film Shakedown: Return of the Sontarans.

These security barriers were breached on occasion by the Sontarans, by manipulating the more technological Vardans, who suborned the Doctor into sabotaging both of these from within ( The Invasion of Time, 1978 ).

Ross Jenkins in The Sontaran Stratagem describes a Sontaran as resembling " a talking baked potato " but The Doctor sticks up for the Sontarans by saying that, to them, he looks like a pink weasel.

In The Sontaran Experiment, the Fourth Doctor comments that " Sontarans never do anything without a military reason.

" The Doctor also comments in The Invasion of Time that Sontarans can mass-clone themselves at rates up to a million embryos every four minutes.

The Sontarans also appeared in a skit for the BBC children's programme Jim'll Fix It titled " A Fix with Sontarans ", along with Colin Baker as the Sixth Doctor and Janet Fielding as Tegan Jovanka.

The Sontarans feature in Destiny of the Doctors, a Doctor Who video game released by BBC Multimedia.

Big Finish Productions first used the Sontarans for their audio drama Heroes of Sontar-a 2011 Fifth Doctor story.

A Sixth Doctor Lost Story from the mid-1980s, written by Andrew Smith, it features the Sontarans and the Rutans on ninetieth century Earth, tracking down a scientist named Jacob, who escaped through time and space.

In The Infinity Doctors, the Doctor negotiated a peace between the Sontarans and the Rutan Host when two of them were left trapped in a TARDIS for several hours and got to talking due to their inability to kill each other.

The Sontarans have also appeared several times in the Doctor Who Magazine comic strip, both as adversaries of the Doctor and in strips not involving the Doctor.

The Fourth Doctor faced the Sontarans in Dragon's Claw ( DWM # 39 -# 45 ), by Steve Moore and Dave Gibbons, where a crew of Sontarans menaced China in 1522 AD.

In Steven Moffat's short story " What I Did on My Christmas Holidays by Sally Sparrow " ( the basis for the Tenth Doctor episode " Blink "), the Ninth Doctor has a rooftop sword fight with two Sontarans in 21st century Istanbul, defeating them with the help of spy Sally Sparrow, apparently before the events of " Rose " in his personal timeline.

The Sontaran homeworld was destroyed in the future during the events of the Seventh Doctor strip Pureblood ( DWM # 193-196 ) but the Sontaran race pool survived, allowing for further cloning ; the strip introduced the concept of " pureblood " Sontarans not born of cloning.

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.

The Rutans only appeared on television in the serial Horror of Fang Rock, in which a single Rutan is encountered, though they are mentioned in some serials featuring Sontarans ( The Time Warrior, The Sontaran Experiment, The Two Doctors, The Poison Sky and The Last Sontaran and Enemy of the Bane episodes of Doctor Who spin off The Sarah Jane Adventures ).

* Shakedown: Return of the Sontarans-Reeltime Pictures ' second production involved the return of popular Doctor Who monsters the Sontarans and the Rutans.

Sophie Aldred, who had played Ace in Doctor Who, stars alongside the villainous Sontarans and Draconians.

A young Doctor Who fan, Gareth Jenkins, was able to take part in a short adventure titled A Fix with Sontarans with Colin Baker.

She made a guest appearance on Jim'll Fix It in a Doctor Who related sketch alongside Colin Baker's Doctor in 1985 ( A Fix with Sontarans ).

Writing about the last role, Ben Rawson-Jones reported that " Blake's 7 fans were ... pleased to see their beloved Cally pop up in the film as a random solicitor .... Chappell's most notable post-Cally role in science fiction was in the direct-to-video Doctor Who spinoff Shakedown: Return of the Sontarans in 1995.

He also appeared in the Doctor Who spin-off Shakedown: Return of the Sontarans.

The Two Doctors introduced a weapon called the Meson Gun ( as named in the Jim'll Fix It Sketch, A Fix with Sontarans ), a large silver rifle with a red fuel tank in the centre which was used by Group Marshal Stike and Varl in the third episode.

However, their armour is vulnerable to standard human firearms in " The Poison Sky ", but the Sontarans in that episode used a ' cordolane signal ' which caused the copper-lined bullets to expand, jamming most firearms instantly.

In the episode, the Sontarans attempt to convert Earth into a breeding world for their clones ; a planet the size of Earth would be able to clone millions at a time.