Grant Markham

Grant Markham was an early 22nd century computer programmer residing on New Earth who went on to travel with the Doctor.

Adventures with the Doctor
Grant first met the Doctor in the year 2191 when his home city of New Tokyo on New Earth was transported into a Marston Sphere. Grant used his computer programming skills to defeat a giant robot dinosaur that was terrorising the city. Although the Doctor was able to save New Tokyo, at the end of the story Grant stayed with him to become his companion. (MA: Time of Your Life)

Grant's next adventure with the Doctor was on his birthplace, the planet Agora, again in the year 2191. They discovered that the Cybermen had been using the planet to gather strong males to use in the cyber-conversion process. Grant met his father, Ben Taggart, who was later killed in an unsuccessful attempt to convert him into a Cyberman as Grant watched. This moved Grant to volunteer to become a Bronze Knight, one of a resistance group of Agorans who themselves used cybernetic implants to become stronger in order to defeat the Cybermen. He was convinced not to give up his humanity by the Knights' creator, the scientist Maxine Carter. The Cybermen attacked the Bronze Knights and slaughtered them all, but Grant lowered their base's temperature and deactivated the Cybermen. (MA: Killing Ground)


 * The exact circumstances of Markham's leaving the Doctor remains unrevealed. 

Possible Fate
A person resembling Grant later found himself removed from the Web of Time, making him, in effect no longer real and stuck in a limbo-like existence in a zeppelin traversing the Time Vortex. (ST: Repercussions...)

Possibly Apocryphal Information
One account states the Doctor and Grant encountered a group of killer Meeps in the Santaland amusement centre in Norway during the 22nd century. (CP: Wish Upon a Star Beast (Perfect Timing))

Another states that, over a longer span of time, during which Grant and the Doctor have many adventures and are also accompanied by a Legion, Grant linked his mind to a computer infected by a virus and was seriously injured. Unwilling to risk his life any further, the Doctor left him at the Bi-Al Foundation. The Doctor later regretted abandoning Grant and returns to apologise, but Grant was unable to forgive him and they parted on bitter terms. (CP: Schrödinger's Botanist (Perfect Timing))


 * These stories may or may not count as canon.