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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Movies (41)
This Changes Everything
2019 · Self
La Razón De Estar Contigo 2: Un Nuevo Viaje
2019 · Hannah Montgomery
Casi Amigos
2017 · Samantha
CSI: Inmortalidad
2015 · Catherine Willows
La Mujer Maravilla
2009 · Hera (voice)
Columbus Day
2008 · Alice
Mr. Brooks
2007 · Emma Brooks
En buena compañía
2004 · Ann
Erin Brockovich, una mujer audaz
2000 · Donna Jensen
Perfect Murder, Perfect Town: JonBenét and the City of Boulder
2000 · Patsy Ramsey
Lethal Vows
1999 · Ellen Farris
Happy Face Murders
1999 · Jen Powell
Giving Up the Ghost
1998 · Anna Hobson
Thanks of a Grateful Nation
1998 · Jerrilynn Folz
Especies II
1998 · Dr. Laura Baker
Gold Coast
1997 · Karen DiCilia
Infierno Bajo Tierra
1997 · Sarah Kellogg
Mente suicida
1997 · Lizzy
Murder Live!
1997 · Pia Postman
My Fellow Americans
1996 · Joanna (uncredited)
Conundrum
1996 · Det. Rose Ekberg
Inflammable
1995 · Lt. (j.g.) Kay Dolan
Especies
1995 · Dr. Laura Baker
Dos policías rebeldes
1995 · Alison Sinclair
Just Looking
1995 · Darlene Carpenter
Where Are My Children?
1994 · Vanessa Meyer Vernon Scott
Lie Down with Lions
1994 · Kate Nessen
The Cowboy Way
1994 · Margarette
Keys
1994 · Maureen 'Kick' Kickasola
Partners
1993 · Georgeanne Bidwell
When Love Kills: The Seduction of John Hearn
1993 · Debbie Banister
Distant Cousins
1993 · Connie
Through the Eyes of a Killer
1992 · Laurie Fisher
In Sickness and in Health
1992 · Mickey
Problema Familiar
1991 · Jennetta
Death Dreams
1991 · Crista Westfield
Blind Vengeance
1990 · Virginia Whitelaw
Always
1989 · Rachel
After Midnight
1989 · Alex (segment "All Night Operator")
Peacemaker
1989 · Mrs. Cooper
China Beach: Pilot
1988 · K.C. Kolowski
TV shows (37)
Boston Blue
2025 · Gwen
CSI: Vegas
2021 · Catherine Willows
Stars in the House
2020 · Self
All Rise
2019 · Lisa Benner
Intelligence
2014 · Lillian Strand
Bajo el domo
2013 · Christine Price
The Talk
2010 · Self
RuPaul: Carrera de drags
2009 · Self - Guest Judge
Stand Up to Cancer
2008 · Self
The Tony Danza Show
2004 · Self
Ellen DeGeneres Show
2003 · Self
CSI: Crime Scene Investigation
2000 · Catherine Willows
Perfect Murder, Perfect Town
2000 · Patsy Ramsey
The Early Show
1999 · Self
The View
1997 · Self
Los Reyes de la Colina
1997 · Mrs. Hanover / Pretty Student (voice)
Sala de urgencias
1994 · Karen Hines
Intimate Portrait
1993 · Self
Frasier
1993 · Emily
Late Night with Conan O'Brien
1993 · Self - Guest
Crímenes perfectos
1993 · Eve Cressy
The Tommyknockers
1993 · Bobbi Anderson
The Larry Sanders Show
1992 · Susan Elliot
The Hidden Room
1991 · Jane
Tales from the Crypt
1989 · Vicki
LIVE with Kelly and Mark
1988 · Self - Guest
China Beach
1988 · KC Koloski
thirtysomething
1987
Shell Game
1987
Matlock
1986 · Victoria Rollins / Laura Norwood
Spenser: For Hire
1985 · Nancy Kettering
American Playhouse
1982 · Mrs. Cooper (segment 'Peacemaker')
This Week
1981
People's Choice Awards
1975 · Self - Presenter
The Price Is Right
1972 · Self
Tony Awards
1956 · Self - Presenter
Golden Globe Awards
1944 · Self - Audience Member, Self - Nominee, Self - Presenter