Plot: When the ladies make a pact never to reveal what they did to Jamie, they realize they must go their separate ways -- and abandon their powers. A guilty Joanna tries to help Penny find closure; sparks fly between Kat and her hot new neighbor, single dad Colin, who has come to Eastwick with his young son Gene and a dark secret; and just as Kat and Joanna are moving on, things gets complicated for Roxie when Darryl returns to Eastwick with the truth about his mysterious past