We're on Cathy's home turf, where she's cooked up a plan for vengeance. Does that plan involve cheating? Perhaps. All's fair in dance and war. Vivi gets a career-threatening injury, Abby puts all her apples in Brooke's basket, we hear the word "snood" about 400 times, and Kendall is still very much in probation, much to Jill's dismay. Join us, won't you?