Mission: Impossible - The Final Reckoning

Mission: Impossible - Dead Reckoning Part One begins with the activation of the Sevastopol submarine's advanced defense system, resulting in the crew's death and the submarine's sinking in the Bering Sea. This event leads to the emergence of a sentient AI, known as the "Entity", which disappears into cyberspace. As world powers compete for control of the Entity, Ethan Hunt retrieves one piece of the crucial two-piece cruciform key from Ilsa Faust, who had faked her own death. Ethan's mission becomes more complicated when he encounters Grace, a thief who steals the key from him, and Gabriel, a shadowy figure from his past who is working with the Entity. Ethan's pursuit of Gabriel and the Entity leads to several intense confrontations, including the death of Ilsa at Gabriel's hands, which devastates Ethan. Despite this, Ethan continues his mission, and with the help of his IMF teammates, he is able to obtain the completed key. The key unlocks a chamber containing the Entity's source code, giving Ethan the opportunity to destroy or control it. In the end, Ethan kills Gabriel during a fight on a train and saves Grace and the passengers by detaching the runaway locomotive. With the completed key in hand, Ethan and his teammate Benji continue their mission to determine the fate of the Entity.