December 28, 1981: K9 Mark III becomes a girl’s best friend

K9_in_the_TARDIS
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, and Sarah Jane Smith.

K9 first appeared in the 1977 adventure The Invisible Enemy but left at the end of Season 15.  K9 Mark II appeared the following season in 1978 and left mid way through Season 18, in January 1981.

K9 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 (A Girl’s Best Friend).

After several adventures, K9 Mark III slowly began breaking down and eventually ended up deactivated in a cardboard box in Sarah’s attic. When the Tenth Doctor met Sarah Jane, he reactivated K9 and made temporary repairs. However Mark III ended up sacrificing himself whilst fighting strange, bat-like creatures.

As a heartbroken Sarah Jane watched the Tenth Doctor depart, the TARDIS dematerialised to reveal Mark IV. K9 said the Doctor rebuilt him with “new omniflexible hyperlink capabilities”.

Appearances

  • A Girl’s Best Friend (K9 and Company)
  • The Five Doctors

Find out more*

Source of information, pictures etc is the TARDIS Data Core* unless stated otherwise.

*Prof Nostalgia & the20thcentury.today are not responsible for external links.

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