FOLKS IN BLACK ROCK have their own way of welcoming mysterious, one-armed stranger John J. Macreedy. Hes welcome to leave. Or theyll make sure he leaves in a pine box.Two-time Academy Award winner* Spencer Tracy (a 1955 Best Actor Oscar nominee for this film) plays World War II veteran Macreedy, who keeps his own counsel about why hes come to Black Rock and who keeps his wits about him when confronted with threats and violence. Director John Sturges (The Great Escape) ramps up the tension while revealing Macreedys mission and the towns grim secret. Robert Ryan, Walter Brennan, Ernest Borgnine and Lee Marvin are among the towns thugs and lap dogs. Im half horse, half alligator, one says. Theyll find Macreedy is even tougher stuff.