Mark Sheppard as Canton Everett Delaware III
There’s no one we want to see more on this list than Mark Sheppard as Canton Everett Delaware III. Sheppard is a veteran of tons of modern shows, including classic sci-fi like Firefly and Battlestar Galactica, so we had a pretty good idea that he would be awesome in “The Impossible Astronaut” and “Day of the Moon.” Lucky for us, we were right! Canton is one of the coolest guests of Matt Smith’s entire run as the Doctor, as the special agent who is forced to become freelance because of his sexual orientation. WE WANT MOAR CANTON PLZ.