The ending of Mission: Impossible (1996) has Ethan expose Jim Phelps as the mole on the train to Paris, then destroy his helicopter in the Channel Tunnel. Jim and Krieger die in the blast. Kittridge takes Max into custody and gets the list back, and Ethan and Luther are cleared. On a flight home, Ethan is offered a new mission.
Why does it work? In my opinion, the key is Kittridge watching the live feed. The film spends its first half making Kittridge the man who wants Ethan caught, and the finale turns him into the witness who can clear Ethan, so the paperwork ending is earned by a set piece rather than by a speech. It could be argued that a climax in this saga lands best when it pays off a plot thread, not only a stunt.
The structure also rewards a second look. The Prague trap kills the team one by one, and the film never shows Jim's death on screen in that sequence, so the later reveal that he is alive and is the traitor is a payoff the first act quietly plants. Claire survives the Prague disaster alongside Ethan, which in hindsight makes her the first sign that the story is not what it seems. By the time Ethan lowers himself on wires into the secure vault at Langley, the audience has been trained to expect that every neat plan will slip, and the train finale is the one plan where Ethan holds the upper hand.
The train also deserves a note from a mechanical point of view. Most of the sequence was shot on Pinewood's 007 Stage against blue screen, with a wind machine capable of producing winds up to 140 mph, and Industrial Light & Magic digitized the footage. That makes the helicopter hooked to a train largely a studio and effects build, with exterior train shots filmed in Scotland on the Glasgow South Western Line. It is a different philosophy from the stunts the saga became known for later: Tom Cruise climbed the Burj Khalifa himself for Mission: Impossible: Ghost Protocol, and the Mission: Impossible: Dead Reckoning Part One motorcycle cliff jump in Hellesylt, Norway followed extensive skydiving and motorcycle jump preparation. Here the thrill comes from the plan and the editing, and the practical stunt reputation arrives later.
The closing offer of a new mission sets up further adventures, and the next one is mission impossible 2.