In the films, Luther is an expert computer hacker who works for the IMF (Impossible Missions Force) division of the CIA alongside Ethan Hunt.

Framed as the mole, with only his teammate Claire Phelps alive, Ethan plots to steal a copy of the list to lure the real traitor out of hiding.

Posing as a team of firefighters, the rogue IMF group breaches the CIA and infiltrates the main computer mainframe via a remote terminal in Langley, Virginia.

After obtaining the list, Ethan discovers that his team leader Jim Phelps not only survived the initial mission in Prague, but also is the real mole.

At the same time, he muses that he is "gonna miss being disreputable" as he is no longer in hiding and incapable of the illegal computer activities he was privy to performing before being reinstated.

This time around, Luther utilizes GPS tracking satellites to keep tabs on Nyah Nordoff-Hall, a GPS-bugged mole they have planted inside of Ambrose's complex.

Luther also provides Ethan with an entrance to a biological lab in the city of Sydney through a jammed-open vent on the roof by hacking into the building's computer-controlled electronics system.

Luther manages to escape just in time with only some cuts and bruises but finds that his main laptop is damaged in the bombing and that the rest of his computer equipment has been destroyed.

He eventually injects Nyah with the cure to the virus (symbolically named, "Bellerophon" after the Greek hero who managed to slay the Chimera according to myth) and helps Ethan escort her safely away from Ambrose.

Nonetheless, Luther continues to be of assistance to Ethan, helping him abduct the man responsible for kidnapping Lindsay, an illegal arms dealer named Owen Davian.

Luther reveals that, thanks to them, he and his IMF mission clean-up crew "blew the entire weekend at the bottom of the San Francisco Bay" searching for the disabled nuclear warhead that Ethan aborted.

[6] He is indirectly responsible for the threat of the main storyline, when Ethan allows his current adversaries to get away with three plutonium cores that could be used to create nuclear weapons to save Luther after he is taken hostage.

Luther later joins Ethan and Benji in hunting the Apostles, a splinter group consisting of the still-free members of the Syndicate, as they attempt to break Lane out of prison with the aid of his associate John Lark, who is in reality August Walker of the CIA.