With Spike's new baby days away, Emma starts thinking about her father. She never knew him, but she has vague memories of him as a doctor. When she tracks him down to a hospital outside of Toronto, she recruits Craig and goes looking for her past. But what she finds puts her mom and her unborn baby brother both at risk. Back at school, Spinner discovers that the key to Paige's heart is through her locker. Actually, it's through J.T.'s locker.