Marg Helgenberger
Acting
Mary Marg Helgenberger (born November 16, 1958) is an American actress. She began her career in the early 1980s and first came to attention for playing the role of Siobhan Ryan on the daytime soap opera Ryan's Hope from 1982 to 1986. She is best known for her role as Catherine Willows in the CBS police procedural drama CSI: Crime Scene Investigation (2000–13) and the subsequent TV movie Immortality (2015). She reprised the role in the sequel CSI: Vegas (2022–present). Helgenberger is also known for playing the role of K.C. Koloski in the ABC drama China Beach (1988–91), which earned her the 1990 Emmy Award for Outstanding Supporting Actress in a Drama Series. She is also known for roles in the TV series Under the Dome and Intelligence, and the films Species (1995), Species II (1998), Erin Brockovich (2000), and Mr. Brooks (2007). Description above from the Wikipedia article Marg Helgenberger, licensed under CC-BY-SA, full list of contributors on Wikipedia.
This Changes Everything
Self
A Dog's Journey
Hannah Montgomery
Almost Friends
Samantha
CSI: Immortality
Catherine Willows
Wonder Woman
Hera (voice)
Columbus Day
Alice
Mr. Brooks
Emma Brooks
In Good Company
Ann
Erin Brockovich
Donna Jensen
Perfect Murder, Perfect Town: JonBenét and the City of Boulder
Patsy Ramsey
Lethal Vows
Ellen Farris
Happy Face Murders
Jen Powell
Giving Up the Ghost
Anna Hobson
Thanks of a Grateful Nation
Jerrilynn Folz
Species II
Dr. Laura Baker
Gold Coast
Karen DiCilia
Fire Down Below
Sarah Kellogg
The Last Time I Committed Suicide
Lizzy
Murder Live!
Pia Postman
My Fellow Americans
Joanna (uncredited)
Conundrum
Det. Rose Ekberg
Inflammable
Lt. (j.g.) Kay Dolan
Species
Dr. Laura Baker
Bad Boys
Alison Sinclair
Just Looking
Darlene Carpenter
Where Are My Children?
Vanessa Meyer Vernon Scott
Lie Down with Lions
Kate Nessen
The Cowboy Way
Margarette
Keys
Maureen 'Kick' Kickasola
Partners
Georgeanne Bidwell
When Love Kills: The Seduction of John Hearn
Debbie Banister
Distant Cousins
Connie
Through the Eyes of a Killer
Laurie Fisher
In Sickness and in Health
Mickey
Crooked Hearts
Jennetta
Death Dreams
Crista Westfield
Blind Vengeance
Virginia Whitelaw
Always
Rachel
After Midnight
Alex (segment "All Night Operator")
Peacemaker
Mrs. Cooper
China Beach: Pilot
K.C. Kolowski