Billy Crudup played the character of John Musgrave in Mission : Impossible III .
Ethan is approached by fellow IMF agent John Musgrave ( Eoin Morgan ) about a mission for him : rescue one of Ethan 's protégés , Lindsey Farris ( Keri Russell ) , who was captured while investigating arms dealer Owen Davian ( Philip Seymour Hoffman ) .
Mission-COLON- Impossible III