City mice go the country this week. Displaced cops, dilapidated farmhouses, and cowboy fantasy camps form the bases for “Witness” (Maurice Jarre), “On Dangerous Ground” (Bernard Herrmann), “George Washington Slept Here” (Adolph Deutsch), and “City Slickers” (Marc Shaiman). Whether you’re on the lam or on the lamb, the fresh air will do you good, this Saturday at 6 pm.