The mole inside the IMF
Ethan is point man on Jim Phelps's team for a Prague mission to protect the NOC list, which names the CIA's undercover agents. Everything goes wrong: the team is killed, Phelps seems to fall from a bridge, and Ethan is the lone survivor. Eugene Kittridge of the IMF tells him the operation was a trap to flush out a mole, and now Ethan is the suspect. He escapes by blowing up a restaurant's aquarium.
On the run, he teams up with Phelps's wife, Claire, and two disavowed agents, hacker Luther Stickell and Franz Krieger, to steal the real list from CIA headquarters at Langley. A hotel Bible and the reference "Job 3:14" make Ethan realize the mole is Phelps himself, alive. On the high-speed train to Paris, he unmasks his mentor in front of Kittridge. Phelps kills Claire and flees by helicopter, but Ethan hooks the line to the train and drags it into the Channel Tunnel. In the end, he and Luther are reinstated.