The Numbers Station (2013)

Central Intelligence Agency operative Emerson Kent is sent to kill a man who owns a bar. Before being killed by Kent, the man reveals he is a former agent who wanted to retire. A witness flees the scene, accidentally leaving his wallet behind. Kent finds the wallet and tracks the witness to his home, where he kills him. Kent spares the life of the man's daughter, Rachel, who follows him outside, hysterical. As Kent tries to convince his boss, Michael Grey, not to kill her, Grey strikes Kent on the back and he falls to the ground. Kent and Rachel share a last look at each other as Grey kills her. Kent is transferred to Suffolk, England to watch over a numbers station. While there, he befriends Katherine, the station broadcaster, and is haunted by memories of the woman who was killed. When the numbers station comes under attack, Kent and Katherine barricade themselves inside. One assassin is already inside the secure station and, after a lengthy shootout, is killed by Kent.