Gregory Melton was a production designer for Torchwood: Miracle Day.
He has enjoyed a long career, working steadily in various art department positions since the mid-1980s. One of his earliest credits was a two-year stint on the police sitcom, Sledge Hammer!. Like Miracle Day director of photography Christopher Faloona, he also worked for a long stretch on Tales from the Crypt. His five-year stint on Crypt in the early 1990s has proved to be his longest continuous job. From the mid the mid-1990s to his work on Miracle Day, he has never stayed in any one job for more than a couple of years, though this is largely because many of the shows on which he's worked have met a quick end. Amongst his year-or-more-long gigs are: Dark Skies, Perversions of Science (a Tales from the Crypt spin-off), Medical Investigation, My Name Is Earl, Private Practice, and Hawthorne.
Immediately before Torchwood, he was apparently freelancing, going from The Walking Dead to Off the Map to Miracle Day.