Don goads Howell into having by-pass surgery. Stacey shares a beer with Harry Ragin. Don and Malcolm realize Nick is Cardway's industrial spy after he's captured photographing top secret files on hidden camera. A devastated Hilary learns the truth about Nick then tells him he only has until morning before facing arrest. At a Johnson family dinner, Summer's grandmother approves of Brian, but Summer's angry brother Walter privately threatens him with bodily harm if he doesn't stay away.