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K9


K9 was the designation given to a series of intelligent, dog-like robots who served as companions of Professor Marius, the Fourth Doctor, Leela, Romana, Sarah Jane Smith, Luke Smith, Starkey, and the Tenth Doctor for a short while.

K9 Mark I, II, III, and IV addressed whomever was directing them as “Master” or “Mistress” depending upon gender, and used the formal “affirmative” and “negative” rather than “yes” and “no”. They were programmed to be both loyal and logical, with a penchant for taking orders literally, almost to a fault. Their striped collars mirrored the Fourth Doctor’s trademark scarf.


Profile


Mark I
Professor Marius, who invented the first K9 in the year 5000 while working on the asteroid K4067, described him as “my best friend and constant companion.” Marius had a dog on Earth, but weight requirements did not allow him to bring his real dog into space, so he built K9. (TV: The Invisible Enemy) He built K9 by using the latest technology. Marius used his own medical computer, a state-of-the-art intra-responsive brain app, protective ant-radiation cladding, probes, a laser scapel, a vision and voice box and two scanning antennas. He put these parts together and created K9. (PROSE: One Man and His Dog) However, K9 might owe his existence to a temporal paradox. According to one account, the Professor copied the remnants of one of the versions of K9 created by the Doctor and given to Sarah Jane Smith. (PROSE: Tautology)

The Professor offered K9 to the Fourth Doctor as the same weight requirements made him unable to take Mark I back to Earth. (TV: The Invisible Enemy) After adventures with Leela and the Doctor, Mark I decided to stay on Gallifrey with his “mistress”. (TV: The Invasion of Time).

The Fourth Doctor and K9 Mark II spent an indeterminate period of time together. However, the Doctor appeared to be activating K9 Mark II, implying that no significant time had elapsed since leaving Gallifrey. (TV: The Ribos Operation) It is possible that the Doctor spent some time at Nest Cottage before activating him. (AUDIO: The Stuff of Nightmares) There are accounts that this model of K9 went on missions on behalf of the Time Lords and was given control of a space vessel called K-NEL. (The Adventures of K9: K9 and the Time Trap, et al)

K9 stayed with Leela on Gallifrey for many years. It was only after the disappearance of her Time Lord husband, Andred, that Leela and her K9 met Romana II and her K9. The two K9s did not get on well and competed. (AUDIO: Weapon of Choice) After Leela became Romana’s bodyguard and after many important missions on her behalf, Leela’s K9 was destroyed by an exploding bomb. Leela was heartbroken, but refused to have a duplicate unit built. (AUDIO: Imperiatrix)

However, K9 survived this and the Last Great Time War. He witnessed the murder of Zanthus Pia by Ahab. His Jixen henchmen fought him and were transported to 2050 Earth. K9 self-destructed to protect the humans nearby, then regenerated into a more advanced model. (TV: Regeneration,The Bounty Hunter)

Mark II
Before this, the Doctor obtained or constructed at least one backup model of K9. Immediately after leaving Mark I behind with Leela, he unpacked K9 Mark II. This version of K9 accompanied the Doctor and his new companion on their quest to locate the segments of the Key to Time, (TV: The Ribos Operation) but the swampy terrain of Delta III made it impossible for him to join them on the planet. At the conclusion of the quest, the Shadow turned K9 to his evil will, giving K9 a sinister personality. (TV: The Armageddon Factor)

The Fourth Doctor found that K9 had contracted laryngitis and had lost his voice as a result of this. K9 was left in the TARDIS while the Doctor and Romana II battled the Daleks and Davros. (TV: Destiny of the Daleks) During a later adventure, he remained patiently in the TARDIS, which would imply that his voice had not yet returned. (TV: City of Death) After his voice returned, it sounded quite different and remained so for a while (TV: The Creature from the Pit) before the familiar voice returned. (TV: The Leisure Hive)

This K9 exhibited the ability to sense and warn others of danger. He was also more mobile than his predecessor, despite his problems with the swamps of Delta III. (TV: The Armageddon Factor) The Doctor often used a glib remark to disarm those who were surprised by K9’s appearance, such as “They’re all the rage in Trenton, New Jersey.” (TV: The Stones of Blood)

K9 traveled to E-Space with the Fourth Doctor and Romana II, where they met Adric. He had his head knocked off while trying to defend Romana, Adric, Varsh, Tylos and Keera. (TV: Full Circle)

Damaged by the time winds, K9 Mark II could not cross back into N-Space with the Doctor. He decided to stay behind at the Gateway with Romana II to help her free the remaining Tharils from slavery. (TV: Warriors’ Gate) Eventually, Romana II and the presumably repaired K9 returned to their own universe and K9 Mark II came to live on Gallifrey. (PROSE: Lungbarrow, WC:Shada, AUDIO: Zagreus)

During Romana’s Presidency of Gallifrey, Leela became her bodyguard, and the two K9 units were forced to work together, not always amicably. AfterMatthias had replaced Romana as President, he nominated her to undertake a mission to find a cure for the Free Time virus, to be followed by exile. K9 opted to remain in the employ of Matthias, fighting the infection on Gallifrey. However, Braxiatel and K9 had planned another operation. Realizing that the only cure to the virus was to end the regeneration capabilities of the Time Lords, Braxiatel used a Time Scoopto collect the Time Lord bio-data archive (along with K9). Romana was asked to decide whether to administer the cure or let Gallifrey die and rebuild it from scratch with the bio-data archive. (AUDIO:Gallifrey)

Mark III
A third model, K9 Mark III (again either obtained or constructed by the Doctor) was shipped in 1978 to Sarah Jane Smith at the home she had shared with her Aunt Lavinia in South Croydon during her companionship of the Third and Fourth Doctors. (TV: A Girl’s Best Friend) Since parting ways with the Doctor (TV: The Hand of Fear) however, Sarah Jane had already gone away and was travelling extensively. The following year, Lavina purchased a manor house and market garden in Moreton Harwood, Gloucester, and took the still crated K9 with her. On 18 December 1981, Sarah Jane and her foster brother Brendan Richards arrived at Lavinia’s home for Christmas, but Lavina had left early for her lecture series in the United States. Sarah Jane opened the crate and received her new companion. (TV: A Girl’s Best Friend)

K9 helped Sarah Jane to defeat Moreton Harwood’s murderous Hecate Cult. (TV: A Girl’s Best Friend) Circa1983, K9 Mark III and Sarah Jane lived in semi-detached house where their gate bore a “beware of dog” sign and Sarah Jane permitted him outside unconcealed. Sensing danger, he advised Sarah Jane to either not go out, or to take him with her. She declined, and K9 thus did not accompany her to Gallifrey. (TV: The Five Doctors) K9 accompanied Sarah to an archaeological dig in Egypt. (COMIC: City of Devils) In the early 1990s, K9 assisted Sarah in investigating a supposedly haunted house. (PROSE: Housewarming)

In 1996, Sarah used K9 to hack into records and find Sam Jones’ home address and later to translate Lost Boy’s speech. (PROSE: Interference – Book One) K9 was briefly possessed by a malevolent entity, but was freed when Sarah accidentally electrocuted him. (PROSE: The Sow in Rut) K9 began slowly breaking down and eventually ended up deactivated in a cardboard box in Sarah’s attic. (PROSE: Moving On) Hilda Winters had K9 dismantled and analysed. (AUDIO: Mirror, Signal, Manoeuvre)

In early 2007, K9 was reactivated by the Tenth Doctor; Sarah Jane was unable to go to any humans for repairs prior as the parts inside K9 could change history. K9’s repairs were short lived. In battling Lucas Finch and his Krillitane invasion at the school the next day, Mark III blew up a vat of Krillitane oil, which was now lethal to the Krillitanes, blowing himself up in the process. (TV: School Reunion)

Mark IV
As a heartbroken Sarah Jane watched the Tenth Doctor depart, the TARDIS de-materialized to reveal Mark IV. K9 said the Doctor rebuilt him with “new omniflexible hyperlink capabilities”. (TV: School Reunion)

Almost as soon as he arrived, K9 Mark IV left Sarah Jane to stabilize a dangerous black hole in space which had been created in Switzerland. He could only speak with Sarah Jane occasionally via a cabinet with a space-time link when the orbit of the black hole intersected with Earth’s and did not know when he would complete the job. (TV: Invasion of the Bane) However, he returned to Earth very briefly during emergencies. He did so on two later occasions in order to render vital assistance. The first time, he foughtMr Smith in pitched battle to give Sarah Jane time to upload the Armageddon Virus. (TV: The Lost Boy) The second time, he quickly uploaded TARDIS base codes to Mr Smith, assisting the Tenth Doctor in returning Earth to its correct location in space. (TV: Journey’s End)

After these events, he returned to monitoring the black hole. He emerged to find a member of the Slitheen family attempting to steal him as part of a revenge plot against Sarah Jane, as she had foiled their plans in the past. K9 banished the Slitheen after reversing one of its attacks. (TV: From Raxacoricofallapatorius With Love)

K9 returned when Ship used the black hole as fuel. Though Sarah Jane, Luke, Rani and Clyde were happy to have K9 back, Mr Smith was not. (TV: The Mad Woman in the Attic) K9 spent a lot of his time in Sarah Jane’s attic at 13 Bannerman Road, Ealing, but left to defeat Travist Polong. He attended Sarah Jane’s abortive wedding to Peter Dalton, where he helped the Tenth Doctor, Luke, Rani and Clyde defeat the Trickster. (TV: The Wedding of Sarah Jane Smith) After helping defeat the Slitheen family, Clyde brought K9 to Park Vale Comprehensive School to help him with his test. He helped defeat the Rakweed before returning home. (TV: The Gift) K9 went to the University of Oxford with Luke, but restored Mr White’s original programming through a mobile phone.(TV: Goodbye, Sarah Jane Smith)

Unlike 25 years earlier where she appeared unconcerned with K9 Mark III being seen, Sarah Jane restricted K9 Mark IV to her Ealing house except in emergencies or when she required his services, lest she have to explain him. Her son Luke covered by explaining to a puzzled Peter Dalton that K9 was a Japanese robot toy with pre-programmed phrases. (TV: The Wedding of Sarah Jane Smith) Nevertheless, she sent K9 to serve Luke when he went away to the University of Oxford. (TV: The Nightmare Man)

Whereas Sarah Jane lifted K9 Mark III into and out of her car, (TV: A Girl’s Best Friend) K9 Mark IV had a “hover mode” allowing him to negotiate the stairs of the Smiths’ three-story house and bi-level attic, and to enter and exit cars. (TV: The Wedding of Sarah Jane Smith, The Gift) The Eleventh Doctor implied that Mark IV was not the first to have the ability to hover. (TV: The Power of Three)


Personality


K9 had a personality very consistent across the models with some contact with the Doctor. He was polite and formal, with pedantry bordering on condescension. Though he often displayed feelings such as sorrow (TV: The Invasion of Time) and self-regard (TV: School Reunion), he often stated that he had not been programmed to have emotions. (TV: Invasion of the Bane)

He did not use contractions such as “you’ve” for “you have” and addressed others by titles such as “Master”, “Mistress”, “Doctor-Master” (to refer to the Doctor) or “Young Master” (Adric, Starkey and in one instance, Clyde). Though he did not seem to resent his subordinate status, he sided with the Doctor’s companions over the Doctor and showed a dark side, regarding other artificially intelligent beings with contempt. (TV: The Invasion of Time, TV: The Wedding of Sarah Jane Smith, TV: Robot Gladiators) He relished a brief chance to act as a figure of power. (PROSE: The Well-Mannered War)

He usually did not engage in computer-like literal thinking, though on one occasion he followed Romana’s instructions to “forget it” to the letter and erased all knowledge of tennis from his memory banks. (TV: The Stones of Blood)

With his great intelligence, he had a tendency to bore people with facts and did not stop immediately when asked, as he did to Leela on Pluto. When being told that he would have to stay behind in the TARDIS, K9 often argued, giving the Doctor reasons why he should go such as “he would be a good dog.” K9 always wanted to assist the Doctor. He had great intelligence and skill at chess, claiming to be able to beat the Doctor in six moves (although this may only have been because he was programmed with all chess games since 1886). (TV: The Sun Makers, The Androids of Tara) K9 had an aggression mode. (TV: State of Decay)

K9 Mark 2 had some obvious commonalities with the Mark I that had preceded him. However, as he had almost completely lost his personal memories, he was forced to reacquaint himself with the world around him. Toward this end, he downloaded thousands of human movies onto his mem-drive, which peppered his speech with 20th and 21st century English colloquialisms that his “brothers” did not typically employ. (TV: Alien Avatar) Despite his negative opinions of emotions, (TV: Mutant Copper) he asked questions about some, such as fear (TV: Fear Itself) and love (TV: Aeolian). He even showed some, laughing when he saved the day, feeling fear (TV: Fear Itself) and being angry. (TV: Regeneration)


Features


K9 Mark I’s mechanisms included rotating ear-probes, telescopic “eye” probe, an extendable nose concealing a powerful laser weapon, flashing lights on the top and the “eye” panel, waggling tail antennae, and ticker-tape tongue. His head could move up and down. His shell was painted in metallicgold/grey. There was a monitor screen on his left flank, though K9 rarely used this during his travels with the Doctor. Around K9’s neck was a tartan collar, (being the Family Tartan of the Clan Buchanonn) from which hung a silver disk. (TV: The Invisible Enemy) He was later modified to fly through the vacuum of space. (TV: Curse of Anubis)

After K9 Mark I was left behind with Leela on Gallifrey, the Doctor built an improved K9 Mark II. In addition to minor cosmetic alterations on the previous model (including the new metallic charcoal paint-work), K9 Mark II also had a slightly different character from his predecessor. Gone was the product of Marius’ version’s 5000 AD technology. This new K9 was a product of the Doctor’s own technology and values. The gun was now used for stunning, not killing and he responded to a dog-whistle. K9 also featured a vast memory-bank, seemingly a mixture of the [Mark One model, the Doctor’s own memory and knowledge and the TARDIS. (TV: The Invasion of Time)

When the Doctor left Sarah Jane Smith on Earth, he created K9 Mark III as Sarah’s companion. The new mechanics of K9 Mark III included larger wheels and a front and back-wheel drive. K9 was also given a brand new coat of paint (this time a metallic blue) and a handle on top of his shell to make carrying him easier. (TV: A Girl’s Best Friend)

When the Tenth Doctor created K9 Mark IV to replace K9 Mark III, he added a shiny metallic blue paint job and other improvements, including an omniflexible hyperlink facility. (TV: School Reunion) Later, though, K9 reverted to his old dark green color. (TV: Invasion of the Bane) In battling Mr Smith (and following the battle) K9 displayed a teleport facility and a laser weapon similar to the previous K9s’. (TV: The Lost Boy)

After K9 Mark I regenerated into K9 Mark 2, his design was radically altered. His ear probes were replaced with larger silver aerials. A set of blue lights on his head flashed when he spoke. Most of his body was dark silver and a silver dog bone was located under his neck. He seemed to have the same capabilities as Mark I but was presumably more advanced. (TV: Regeneration)

After K9 Mark 2’s apparent rejuvenation, he looked similar to his predecessor, but with a bright blue coat of paint and K9 Mark I’s old collar. (TV: The Eclipse of the Korven)


Appearances


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