Tobin Frost is a fictional character from the 2012 action thriller film, Safe House. He is portrayed by actor Denzel Washington. Frost is a former CIA operative who becomes a rogue agent, leading to his capture and subsequent interrogation at a safe house in South Africa. His character is known for his cunning and resourcefulness. In the film, Frost's presence creates tension and danger, particularly for the young CIA agent, Matt Weston, played by Ryan Reynolds. As the story unfolds, Frost's motivations and past are revealed, showcasing the complexities of loyalty and betrayal within the world of espionage.