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 (2000β13) and the subsequent TV movie Immortality (2015). She reprised the role in the sequel CSI: Vegas (2022βpresent). Helgenberger is also known for playing the role of K.C. Koloski in the ABC drama China Beach (1988β91), 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.
Erin Brockovich
2000
Species
1995
Bad Boys
1995
Species II
1998
Mr. Brooks
2007
A Dog's Journey
2019
Through the Eyes of a Killer
1992
Perfect Murder, Perfect Town: JonBenΓ©t and the City of Boulder
2000
Fire Down Below
1997
Lie Down with Lions
1994
In Good Company
2004
Always
1989
Inflammable
1995
Keys
1994
Almost Friends
2017
Just Looking
1995
Wonder Woman
2009
My Fellow Americans
1996
The Cowboy Way
1994
The Last Time I Committed Suicide
1997
After Midnight
1989
Columbus Day
2008
Conundrum
1996
Gold Coast
1997
Death Dreams
1991
This Changes Everything
2019
Peacemaker
1989
Where Are My Children?
1994
CSI: Immortality
2015
Lethal Vows
1999
Crooked Hearts
1991
China Beach: Pilot
1988
Distant Cousins
1993
Happy Face Murders
1999
Murder Live!
1997
In Sickness and in Health
1992
Thanks of a Grateful Nation
1998
When Love Kills: The Seduction of John Hearn
1993
Blind Vengeance
1990