|K-9 Mark I|
|Also known as:||K-9|
|Appearances:||Full List of Appearances|
|Actor:||John Leeson (voice)|
Professor Marius invented the first K-9 because weight requirements did not allow him to bring his real dog from Earth into space (DW: The Invisible Enemy) though K-9 may owe his existence to a temporal paradox. According to one account, the professor copied the remnants of one of the version of K-9 created by the Doctor and given to Sarah Jane Smith. (DWM: Tautology)
The Professor offered K-9 to the Doctor as the same weight requirements made him unable to take Mark I back to Earth with him. (DW: The Invisible Enemy) After a number of adventures with Leela and the Doctor, Mark I decided to stay on Gallifrey with his "mistress". (DW: The Invasion of Time).
There are (possibly apocryphal) accounts that this model of K-9 later performed 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).
K-9 Mark I is known to have survived the Last Great Time War. At some point while tracking members of a race known as the Jixen he was pulled to mid-21st century Earth. Upon arrival he self-destructed both destroying himself and the Jixen. Unlike other K-9 models, Mark I had by this time been equipped with a regeneration circuit which allowed him to be recreated as a new model. (K9TV: Regeneration) However, it is possible that Mark I escaped when Gallifrey was transported next to Earth. (DW: The End of Time)
The mechanics of K-9 Mark I included rotating ear-probes, telescopic 'eye' probe, extendable nose, flashing lights on the top and the 'eye' panel, waggling tail antennae, and ticker-tape tongue. The head could also move up and down. The shell was painted in gold/grey metallic. Around K9's neck was a tartan collar, from which hung a silver disk. (DW: The Invisible Enemy)
|Variations of K-9|
|K-9 Mark I – K-9 Mark II – K-9 Mark III – K-9 Mark IV
|Companions of the Fourth Doctor|
Sarah Jane Smith • Harry Sullivan • Leela • K-9 Mark I • K-9 Mark II • Romana (first incarnation) • Romana (second incarnation) • Adric • Tegan Jovanka • Nyssa
Sharon Davies • Mike Yates