Mary McCormack

Mary McCormack, an American actress with a career marked by notable television roles, has played Justine Appleton in the legal drama series "Murder One" and Deputy National Security Adviser Kate Harper in "The West Wing," before taking on the role of Deputy U.S. Marshal Mary Shannon in the comedic Western series "In Plain Sight." More recently, she has portrayed Peggy in the family sitcom "The Kids Are Alright," each role showcasing her versatility and range in television.