Deep Impact
Andrea Baker
The people behind our stories
Mary McCormack
Acting
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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).
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42 acting credits · Includes cameos and other appearances where listed.
Miracle on 34th Street
Myrna Foy
1408
Lilly Enslin
Vicious
Mother
K-PAX
Rachel Powell
True Crime
Michelle Ziegler
54
New Year's Eve Wife (uncredited)
Full Frontal
Linda
Fathers' Day
Virginia Farrell (uncredited)
Gun Shy
Gloria Nesstra
Drone
Ellen
Scooby-Doo! WrestleMania Mystery
Ms. Richards (voice)
Mystery, Alaska
Donna Biebe
High Heels and Low Lifes
Frances
Private Parts
Alison Stern
Dickie Roberts: Former Child Star
Grace Finney
Unpregnant
Debra Clarke
For Your Consideration
Pilgrim Woman
Treehouse
Lilith
The Crash
Sarah Schwab
Alien Code
Rebecca
The Big Tease
Monique
Escape from Polygamy
Leann
The Alarmist
Sally
Getting to Know You
Leila Lee
Should've Been Romeo
Ellen
Backfire!
Sarah
A Country Called Home
Amanda
World Traveler
Margaret
Murder One: Diary of a Serial Killer
Justine Appleton
BigLove
Phoebe
Colin Fitz
Moira
The Unprofessional
The Unprofessional
Hilary Pfeiffer-Dunne
Harvest
Agent Becka Anslinger
Other Voices
Anna
Madison
Bonnie McCormick