S3, E10: After learning from Sam’s sister that he doesn’t plan on ever getting married again, Cassie takes a sojourn to Chicago to clear her head and meet with an old friend. When Sam finds out, he impulsively (and uncharacteristically) heads off to track her down. Meanwhile, the wedding planning has gotten out of control – Michael and Vanessa are fed up with their overbearing others and decide to call the whole thing off.