The Sentinel Pics

Pete Garrison (Michael Douglas) is a Secret Service agent and one of the personal bodyguards for First Lady of the United States Sarah Ballentine (Kim Basinger), with whom he is having an affair. He is one of the oldest and most experienced agents, having been involved in saving Ronald Reagan's life during the Reagan assassination attempt.

A fellow agent and close friend, Charlie Merriweather (Clark Johnson), is murdered. Garrison gets word from a trusted informant that the killing of Merriweather is related to an assassination plot against the President. The intelligence provided by the informant reveals that a mole with access to the President's security detail had provided information to the assassins.

The Secret Service Protective Intelligence Division, led by Garrison's former protégé and ex-friend David Breckinridge (Kiefer Sutherland) with rookie partner Jill Marin (Eva Longoria), is tasked with investigating the plot, which begins with polygraphs for every agent. Meanwhile, the mole discovers the discussion with the informant and Garrison's affair with the First Lady, and attempts to blackmail Garrison by luring him to a coffee shop known to be a meeting point for Colombian gangs. After failing the polygraph test (for lying about the affair), Garrison becomes the prime suspect for providing the information to the assassins.

Breckinridge confronts Garrison at home and begins to interrogate him. The source of rancor between them comes to light: Garrison supposedly had an affair with Breckinridge’s wife and caused the breakup of their marriage, which he denies. Garrison escapes capture and conducts an independent investigation of the assassination plot, while making brief contact with the First Lady to deny his involvement. He tries to contact the informant who gave him the tip, but finds that he has been killed.

Breckinridge gets the drop on Garrison but refuses to kill him, despite giving other agents "shoot to kill" orders. Using his contacts with sympathetic agents and family members, Garrison learns the assassins are headed to Toronto to attack the president at the G8 summit. Garrison tells Marin of the discovery but later finds that any incriminating evidence has been removed before she can arrive.

The First Lady discloses her affair with Garrison to Breckinridge, who now believes that Garrison is innocent. Together in Toronto, they discover the identity of the assassins and the mole, senior agent William Montrose (Martin Donovan), who was never polygraphed. Montrose is in charge of directing security at the G8 summit.

The leader of the assassins, The Handler (Ritchie Coster), tells Montrose to give him the President. Montrose attempts to refuse, but there is a threat to the lives of the agent's wife and two daughters if he backs out. Emotionally torn, Montrose is instructed by The Handler to lead the President to the summit while jamming the communication radios; the assassins shall handle the rest.

On the night of the President's speech, Breckinridge and Garrison race to the summit. The assassins, dressed as Royal Canadian Mounted Police (RCMP) ERT operators, kill several agents and try to kill the President. Montrose reveals he is the mole to the President, despite the assassin's threats against Montrose's family. Montrose then purposely walks in front of and is ultimately killed by one of the assassins in the stairwell.

Garrison, Breckinridge and Marin kill the remaining disguised assa

The Sentinel is a 2006 crime thriller film directed by Clark Johnson about a veteran United States Secret Service bodyguard who is suspected as a traitor after an attempted assassination of the president reveals that someone within the Service is providing information to the assassins.