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 Dr. Linda Conley(2 eps)
as Willie Day(16 eps)
as Debra Clarke
as Anne Finley(1 ep)
as Lilith
as Peggy Cleary(23 eps)
as Self(25 eps)
as Mary McCormack(1 ep)
as Chloe Daniels(1 ep)
as Janet(2 eps)
as Ellen
as Casey(8 eps)
as Rebecca
as Bitsy Hewitt-Bowles(2 eps)
as Sarah Schwab
as Kathy DeSantis(1 ep)
as Self - Panelist(1 ep)
as Self - Panelist(1 ep)
as Self(2 eps)
as Amanda
as Herself(1 ep)
as Abigail Liukin(3 eps)
as Ms. Richards (voice)
as Caroline Yoder(9 eps)
as Leann
as Molly Levy(2 eps)
as Ellen
as Lisa Elliot(1 ep)
as Denna Altshuler(7 eps)
as Hilary Pfeiffer-Dunne
as Self - Guest(1 ep)
as Self(1 ep)
as Mary Shannon(61 eps)
as Lilly Enslin
as Pilgrim Woman
as Lexi
as Bonnie McCormick
as Self(2 eps)
as Carole McKay(3 eps)
as Maggie Morris(10 eps)
as Self(1 ep)
as Grace Finney
as Self(1 ep)
as Linda
as Margaret
as Rachel Powell
as Mary Shannon(1 ep)
as Frances
as Phoebe
as Daphne
as Gloria Nesstra
as Anna
as Monique
as Donna Biebe
as Kate Harper(48 eps)
as Self - Guest(2 eps)
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 Justine Appleton(41 eps)
as Beth Eckhart(7 eps)
as Sarah
as Myrna Foy
as Debbie(6 eps)
as Rickie the Bartender(1 ep)
as Self - Nominee(1 ep)
