Charlie is shocked and furious when his ex from four years ago Pamela Rush turns up as swears her adorable son is his. Seeing traits of himself in the boy, Charlie is quickly delighted with paternal prospects, but Pamela already left San Francisco again. Bailey can't appreciate Will's efforts to arrange a date for him, feeling it's too soon after his Jill trauma, yet discovers he has a lot in common with clearly interested campus waitress Sarah Reeves. Julia discovers Jill's brother Griffin, whom she dated all summer while Justin was in London with his father, knows about her infidelity and feels free to see others. Justin returns and rebukes her hypocrisy for bugging him about an innocent companion from his youth, still ignorant about Griffin.