Sam Foster is a New York psychiatrist, portrayed by Ewan McGregor, who is intelligent, observant, and generally composed. He has a quiet, somewhat reserved presence and tends to listen more than he speaks, carefully watching people and picking up on small details in their behavior. He comes across as compassionate without being overly sentimental, maintaining a professional distance with his patients while still genuinely caring about what happens to them. His work is clearly important to him, and he takes the responsibility of looking after vulnerable people seriously. Physically, Sam has a fairly understated and professional appearance. He has short, slightly tousled brown hair, a light complexion, and a lean build, usually dressed in muted, somewhat old-fashioned professional clothing—dark trousers, shirts, coats and blazers. His appearance isn't particularly flashy, which fits his quiet personality. In his work, Sam is analytical and attentive. He listens closely, asks direct but measured questions, and tries to understand what is behind a patient's behavior rather than simply taking everything at face value.