 The series returns to form as Cory and Shawn unite for the last time as a "bad boy" team to help Mr. Feeny, whose hesitation in declaring his feelings for Dean Bolander looks like a fatal mistake when her ex-husband Curits returns from an expedition bent on winning her back. Shawn and Cory trash the interloper s lab and blame in on a jealous rage by Feeny -- who then saves Dean Bolander s life for real by swatting the rare bee brought back by Curits just before it stings his highly allergic love. She explains that she was not taken in for a moment by the boys  ruse -- just impressed that Feeny s students care about him so much. Meanwhile, Rachel challenges Jack to take her out on a real date.