Clint Eastwood's film 'Mystic River' (2003) is discussed by the director himself, screenwriter Brian Helgeland, the novel's author Dennis Lehane, and the ensemble cast (Sean Penn, Tim Robbins, Kevin Bacon, Laura Linney, Laurence Fishburne, and Marcia Gay Harden), who share their perspectives on the themes of the film and their collaboration with Eastwood.