Pretending the U.S. has been occupied by a foreign power: an IMF ruse designed to retrieve stolen secrets from a spy. Whitmore Channing: Kevin McCarthy. Shewitt: Scott Walker. Novak: Ted Gehring. Phelps: Peter Graves. Barney: Greg Morris. Gristin: Lee Paul. Casey: Lynda Day George. Operative: Eric James. Willy: Peter Lupus.