The storyline on Final Reckoning that has been revealed states that Hunt and his team are tracking down the last of "The Entity," an AI system unleashed by the global syndicate, "The Catalyst." The AI threatens global security in pursuit of its own ambitions in global communications, finance, and military operations..

Tom Cruise’s dedication to practical stunts reaches new depths in Mission: Impossible – The Final Reckoning, with Empire magazine revealing the actor risked hypoxia while filming an intense underwater sequence.