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Mary Catherine McCormack is an American actress. She has had leading roles as Justine Appleton on the series Murder One (1995–1997), as Deputy National Security Adviser Kate Harper on The West Wing (2004–2006), as Deputy U.S. Marshal Mary Shannon on In Plain Sight (2008–2012), and as Peggy on the comedy series The Kids Are Alright (2018–2019).
as Mother
as Debra Clarke
as Lilith
as Ellen
as Rebecca
as Sarah Schwab
as Amanda
as Ms. Richards (voice)
as Leann
as Ellen
as Hilary Pfeiffer-Dunne
as Lilly Enslin
as Pilgrim Woman
as Lexi
as Bonnie McCormick
as Grace Finney
as Linda
as Margaret
as Rachel Powell
as Frances
as Phoebe
as Daphne
as Gloria Nesstra
as Anna
as Monique
as Donna Biebe
as Michelle Ziegler
as Agent Becka Anslinger
as Leila Lee
as Sally
as New Year's Eve Wife (uncredited)
as Andrea Baker
as Justine Appleton
as Virginia Farrell (uncredited)
as Alison Stern
as Moira
as Sarah
as Myrna Foy
