Episode: 5x01 | Airdate: Mar 16, 2012
Mary returns from maternity leave and encounters a new dynamic at the office in the Season 5 premiere. Elsewhere, Mary is assigned to protect a witness who could destroy a powerful secret society.
Episode: 5x02 | Airdate: Mar 23, 2012
Mary scrambles to find child care while working on a case in which a hoarder witnessed a violent murder.
Episode: 5x03 | Airdate: Mar 30, 2012
Mary and Marshall turn to a Native American detective to help them track down a witness who's hiding on an Indian reservation.
Episode: 5x04 | Airdate: Apr 6, 2012
Mary looks after a bigamist, who's hiding from his former employer and his two wives.
Episode: 5x05 | Airdate: Apr 13, 2012
Mary helps a drag queen stay out of trouble, while Marshall takes part in an undercover sting.
Episode: 5x06 | Airdate: Apr 20, 2012
Mary's fugitive father surfaces, putting Jinx and Brandi in danger and leaving Mary to wonder whom she can trust.
Episode: 5x07 | Airdate: Apr 27, 2012
The FBI keeps an eye on Mary after her father goes on the lam seeking vengeance. Mary tries to lose the agents tailing her in order to track her father down herself.
Episode: 5x08 | Airdate: May 4, 2012
In the series finale, Mary feels torn between a witness and her family, who gather for an unexpected reunion. Elsewhere, big changes occur at the WITSEC office.
