Stephen Graham, Anna Maxwell Martin and Daniel Mays star in Code 404, an original TV comedy drama set in the near future in the Special Investigation Unit at the London Met.   DI John Major had it all: wife Kelly, a police partner who was also his best friend, and a glittering career in the police force… when his cover was blown and he met an untimely death. One year later, he’s back – part A.I. and better than ever… or so he’d like to believe. Full of glitches, he’s got to track down the person who shot him, prove himself as a cop so as not to get shut down, and save his marriage and his friendship, all with his partner Carver by his side.