Jack and his team try to determine if foul play was involved in the 1991 adoption of 16-year-old Serene Barnes (Tina Majorino - "Andre") after the teen shows up at the FBI offices claiming she was kidnapped as a young child. When Serene discovers an old newspaper article about a 3-year-old girl with the same first name, who was kidnapped the year she was adopted--13 years ago--she wonders if her loving adoptive parents may have actually kidnapped her. Serene's story of abduction seems feasible after the team learns that there was a missing Serene Andrews who was never found. Meanwhile, Jack shocks the team with news that he's moving to Chicago with his family. Lynn Whitfield ("The Josephine Baker Story," "Eve's Bayou") guest stars as Paula Van Doren, and Mackenzie Phillips ("One Day at a Time," "The Guiding Light") guest stars as Theresa Caldwell.