Marg Helgenberger
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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.
Known for
Credits
Bad Boys (1995)
as Alison Sinclair
Erin Brockovich (2000)
as Donna Jensen
A Dog's Journey (2019)
as Hannah Montgomery
Species (1995)
as Dr. Laura Baker
Species II (1998)
as Dr. Laura Baker
Always (1989)
as Rachel
Mr. Brooks (2007)
as Emma Brooks
Fire Down Below (1997)
as Sarah Kellogg
In Good Company (2004)
as Ann
Wonder Woman (2009)
as Hera (voice)
Almost Friends (2017)
as Samantha
The Cowboy Way (1994)
as Margarette
My Fellow Americans (1996)
as Joanna (uncredited)
Columbus Day (2008)
as Alice
CSI: Immortality (2015)
as Catherine Willows
After Midnight (1989)
as Alex (segment "All Night Operator")
Inflammable (1995)
as Lt. (j.g.) Kay Dolan
The Last Time I Committed Suicide (1997)
as Lizzy
Murder Live! (1997)
as Pia Postman
This Changes Everything (2019)
as Self
Lethal Vows (1999)
as Ellen Farris
Crooked Hearts (1991)
as Jennetta
Death Dreams (1991)
as Crista Westfield
Just Looking (1995)
as Darlene Carpenter
Thanks of a Grateful Nation (1998)
as Jerrilynn Folz
Conundrum (1996)
as Det. Rose Ekberg
Gold Coast (1997)
as Karen DiCilia
Partners (1993)
as Georgeanne Bidwell
In Sickness and in Health (1992)
as Mickey
Perfect Murder, Perfect Town: JonBenét and the City of Boulder (2000)
as Patsy Ramsey
Lie Down with Lions (1994)
as Kate Nessen
Distant Cousins (1993)
as Connie
Blind Vengeance (1990)
as Virginia Whitelaw
Through the Eyes of a Killer (1992)
as Laurie Fisher
Where Are My Children? (1994)
as Vanessa Meyer Vernon Scott
China Beach: Pilot (1988)
as K.C. Kolowski
Happy Face Murders (1999)
as Jen Powell
Giving Up the Ghost (1998)
as Anna Hobson
Keys (1994)
as Maureen 'Kick' Kickasola
When Love Kills: The Seduction of John Hearn (1993)
as Debbie Banister
Peacemaker (1989)
as Mrs. Cooper