From Wikipedia, the free encyclopedia.
Patty McCormack (born August 21, 1945) is an American actress with a career in theater, films and television.
She achieved success as a child actress, and received a nomination for an Academy Award for Best Supporting Actress for her performance in The Bad Seed (1956). Her acting career has continued with supporting roles in film and television, including a more recent performance as Pat Nixon in Frost/Nixon (2008).
Description above from the Wikipedia article Patty McCormack, licensed under CC-BY-SA, full list of contributors on Wikipedia.

The Bad Seed Returns
Dr. March
2022

Always Amore
Nonna
2022

Dirty John
Dr. Margot Hayes · (1 episode)
2018

Eli Roth's History of Horror
Self · (1 episode)
2018

The Bad Seed
Dr. March
2018

House of Deadly Secrets
Sylvia Holmes
2018

Chicanery
Sandra Monescu
2017

A Moving Romance
Mrs. Norrell
2017

The Ranch
Charlene · (1 episode)
2016

Marsha Hunt's Sweet Adversity
Self
2015

Buttwhistle
Grandma Confer
2014

The Master
Mildred Drummond
2012

Scandal
Anne Pierce · (1 episode)
2012

Soda Springs
Beth
2012

GCB
Chessy · (1 episode)
2012

Hart of Dixie
Sylvie Stephens-Wilkes · (4 episodes)
2011

2nd Take
Estelle
2011

Hawaii Five-0
Tabitha May · (1 episode)
2010
Safari: Silent Predators
Vera Conrad
2010

Elevator Girl
Rosemary
2010

Citizen Jane
Aunt Gertrude
2009

A Christmas Proposal
Maggie
2008

Frost/Nixon
Pat Nixon
2008

Private Practice
Cynthia · (1 episode)
2007

Greek
Joan · (2 episodes)
2007

In the Wall
Dolores
2007

Left In Darkness
Grandmother
2006

South of Nowhere
Mary Spencer · (1 episode)
2005

Criminal Minds
Marcia Gordon · (1 episode)
2005

Supernatural
Eleanor Holmes / Betsy · (1 episode)
2005

Shallow Ground
Helen Reedy
2005

Grey's Anatomy
Rebecca Franklin · (1 episode)
2005

Mystery Woman: Snapshot
Barbara Sommers
2005

Gone But Not Forgotten
Andrea Hammerhill
2005

Target
Maysie
2004

Desperate Housewives
Teresa Pruitt · (1 episode)
2004
Enfant Terrible: A Conversation with Patty McCormack
2004

The Kiss
Priscilla Standhope
2003

Inhabited
Olivia Hagen
2003

The Medicine Show
Janice Piegi
2001
Choosing Matthias
Mrs. Leonard
2001

Acceptable Risk
Lois
2001

Family Law
Monica Whitman · (1 episode)
1999

Silent Predators
Vera Conrad
1999

The Sopranos
Liz La Cerva · (4 episodes)
1999

Mommy's Day
Mrs. Sterling
1997

Mommy
Mommy
1995

ER
Mrs. Dwyer · (1 episode)
1994

Freddy's Nightmares
Estonia 'Stoney' Adler · (1 episode)
1988

Saturday the 14th Strikes Back
Kate Baxter
1988

Private Road: No Trespassing
Dave Roberts
1988

Second Chance
Wendy Worth · (1 episode)
1987

Answers
Mandy Morgan (Segment "A Good Time")
1985

Murder, She Wrote
Lana Whitman · (1 episode)
1984

Murder, She Wrote
Det. Kathleen Chadwick · (1 episode)
1984

Invitation to Hell
Mary Peterson
1984

Night Partners
Sophie Metzman
1983

The Awakening of Cassie
Sally
1982

Magnum, P.I.
Carol Baldwin · (1 episode)
1980

The Ropers
Anne Brookes · (28 episodes)
1979

Dallas
Evelyn Michaelson (as Patricia McCormack) · (1 episode)
1978

The Love Boat
Beth Donaldson · (1 episode)
1977

Bug
Sylvia Ross
1975

Murder Impossible
Tanya
1974

Barnaby Jones
Angie McClaine · (1 episode)
1973

The Young Animals
Janet
1968

The Young Runaways
Deannie Donford
1968

The Mini-Skirt Mob
Edie
1968

Maryjane
Susan Hoffman
1968

Jacktown
Margaret
1962

The Mike Douglas Show
Self · (1 episode)
1961

The Explosive Generation
Janet Sommers
1961

The Adventures of Huckleberry Finn
Joanna Wilkes
1960
The Chevy Mystery Show
Dotty Halsey · (1 episode)
1960
Peck's Bad Girl
Torey Peck · (14 episodes)
1959

Kathy O'
Kathy O'Rourke
1958

All Mine to Give
Annabelle Eunson
1957
The Lux Show
Self · (1 episode)
1957

The Bad Seed
Rhoda Penmark
1956

Atomic Attack
Ginny Mitchell
1954

Two Gals and a Guy
Fay Oliver (uncredited)
1951