Who is Grant Markham? I'm not sure why I'm even making this page, since everyone knows who he is. But if you didn't know, he was a programmer traveled in the TARDIS, with the Sixth Doctor as his companion. He is well known for his mysterious departure. Who knows where he is now? Probably out fighting crimes, and getting chicks (and the occasional dude). Oh, and if you don't know who Grant is, you're obviously new to this, and probably shouldn't be on this site.