Code 404

The crime fighting duo of the future is back. DI Carver and his AI-driven partner DI Major are out of beta and releasing on time for version 2.0. Unfortunately, there’s still a few bugs to patch out.

About Code 404

DI John Major (Daniel Mays) had it all: wife Kelly (Anna Maxwell Martin), best friend and police partner Carver (Stephen Graham), 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 to boot.

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The characters

Meet the cast of Code 404

DI Carver

Stephen Graham

DI Major

Daniel Mays


Anna Maxwell Martin

Dr. Parfit

Amanda Payton

Superintendent Dennett

Rosie Cavaliero

Police Commissioner Chalmers

Tracy Ann Oberman


Steve Oram


Emily Lloyd-Saini

Clifford Major

Clive Russell

PC Williams

Michelle Greenidge


Meera Syal

Episode guide

Check out some more Code 404

Series 1

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Episode 1

Top cop John Major is killed after a failed operation. But then the Met brings him back - as an AI prototype.

Episode 2

Major screws up during an investigation and Carver wonders whether to turn him in. But when he learns of the consequences, he decides to cover for him.

Episode 3

After he and Carver are given a new assignment by Dennett, a suspicious Major prefers to stake out Kelly's work as he has a hunch she's been seeing someone else.

Episode 4

The pressure is on in the latest assignment - covering for the head of the AI Ethics Committee. Failure could mean it's shutdown for Major once and for all...

Episode 5

To Carver's bewilderment, Major reveals that he is going to move back in with Kelly. Parfit discovers disturbing information in the AI Ethics files.

Episode 6

With Major's AI finally living up to the hype, Carver and Kelly come clean about their relationship. The team lies in wait to catch The Juggler.

Series 2

Check out some more Code 404

Episode 1

Major, Carver and Kelly have gone their separate ways. Things are looking up for the AI-enhanced Major, whilst Carver is gunning for a promotion and is knee deep in a new case.

Episode 2

Carver and Major receive new information on the Chelsea Bridge Case – a £50 million robbery committed twenty years ago by a gang who seemed to vanish into thin air.

Episode 3

Taken off the Chelsea Bridge case, Major and Carver are assigned an investigation into reports of a dangerous new drug used in an underground MMA fight ring.

Episode 4

After narrowly foiling a bomb plot, Carver and Major suspect it was just one member of a much larger organisation. Clifford Major continues to throw wrenches into the Chelsea Bridge case.

Episode 5

Major’s mood swings are getting out of hand. He and Carver are given the task of supplying Cleasby with a new identity under witness protection.

Episode 6

On the verge of full-blown systems failure, Major makes a desperate, last ditch effort to clear his dad’s name. Carver believes he’s got Clifford trapped, but the old cop isn’t going down that easily.

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