Marg Helgenberger
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).
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Acted in
CSI: Vegas
2021
as Catherine Willows
Stars in the House
2020
as Self
All Rise
2019
as Lisa Benner
This Changes Everything
2019
as Self
A Dog's Journey
2019
as Hannah Montgomery
Almost Friends
2017
as Samantha
CSI: Immortality
2015
as Catherine Willows
Intelligence
2014
as Lillian Strand
Under the Dome
2013
as Christine Price
Wonder Woman
2009
as Hera (voice)
RuPaul's Drag Race
2009
as Self
RuPaul's Drag Race
2009
as Self - Judge
RuPaul's Drag Race
2009
as Self - Judge (archive footage)
Columbus Day
2008
as Alice
Mr. Brooks
2007
as Emma Brooks
In Good Company
2004
as Ann
CSI: Crime Scene Investigation
2000
as Catherine Willows
Erin Brockovich
2000
as Donna Jensen
Perfect Murder, Perfect Town: JonBenét and the City of Boulder
2000
as Patsy Ramsey
Perfect Murder, Perfect Town: JonBenét and the City of Boulder
2000
as Patsy Ramsey
Lethal Vows
1999
as Ellen Farris
Happy Face Murders
1999
as Jen Powell
Giving Up the Ghost
1998
as Anna Hobson
Thanks of a Grateful Nation
1998
as Jerrilynn Folz
Species II
1998
as Dr. Laura Baker
Gold Coast
1997
as Karen DiCilia
Fire Down Below
1997
as Sarah Kellogg
The Last Time I Committed Suicide
1997
as Lizzy
Murder Live!
1997
as Pia Postman
King of the Hill
1997
as Mrs. Hanover / Pretty Student (voice)
My Fellow Americans
1996
as Joanna (uncredited)
Conundrum
1996
as Det. Rose Ekberg
Inflammable
1995
as Lt. (j.g.) Kay Dolan
Species
1995
as Dr. Laura Baker
Bad Boys
1995
as Alison Sinclair
Just Looking
1995
as Darlene Carpenter
ER
1994
as Karen Hines
Where Are My Children?
1994
as Vanessa Meyer Vernon Scott
Lie Down with Lions
1994
as Kate Nessen
The Cowboy Way
1994
as Margarette
Keys
1994
as Maureen 'Kick' Kickasola
Intimate Portrait
1993
as Self
Partners
1993
as Georgeanne Bidwell
Frasier
1993
as Emily
Fallen Angels
1993
as Eve Cressy
When Love Kills: The Seduction of John Hearn
1993
as Debbie Banister
Distant Cousins
1993
as Connie
The Tommyknockers
1993
as Bobbi Anderson
Through the Eyes of a Killer
1992
as Laurie Fisher
In Sickness and in Health
1992
as Mickey
Crooked Hearts
1991
as Jennetta
Death Dreams
1991
as Crista Westfield
Blind Vengeance
1990
as Virginia Whitelaw
Always
1989
as Rachel
After Midnight
1989
as Alex (segment "All Night Operator")
Tales from the Crypt
1989
as Vicki
China Beach: Pilot
1988
as K.C. Kolowski
China Beach
1988
as KC Koloski
thirtysomething
1987
Shell Game
1987
Matlock
1986
as Victoria Rollins / Laura Norwood
Spenser: For Hire
1985
as Nancy Kettering
The Price Is Right
1972
as Self
Tony Awards
1956
as Self - Presenter