Your mission, if you choose to accept it, is going to last a while. Paramount Pictures' Mission Impossible - The Final Reckoning, set to be the culmination of Tom Cruise'sMission: Impossible franchise, has a runtime of two hours and 49 minutes, according to ComicBook.com, making it the longest film in the Mission: Impossible series. The nearly three-hour runtime means audiences can expect some more heart-pounding action from Cruise's Ethan Hunt.