When Jack casually gives Durbin some marriage advice, it backfires, gets Durbin kicked out of the house, and Jack takes him in. The A.P. Bio kids tell Jack if they can get Miles' DNA, they'll learn a little biology while pulling off the ultimate revenge.

Jack uses Michelle's annual murder mystery party to impress Lynette. Meanwhile, in a moment of desperation, the students break into Whitlock High to steal the A.P. Bio practice exams.

Jack is outraged when his old high school bully is hired as a motivational speaker at Whitlock. Mary, Stef and Michelle set their own personal goals of female empowerment, unintentionally causing a rift between Helen and Durbin.