Grant was born in 2172. (PROSE: Killing Ground) He first met the Sixth 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 terrorising the city. The Doctor saved New Tokyo. At the end of the affair, Grant went with him to become his companion. (PROSE: Time of Your Life)