
Marg Helgenberger
Biography
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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Known For

TV
Frasier
Emily
1993

TV
CSI: Crime Scene Investigation
Catherine Willows
2000

TV
The View
Self
1997

TV
Golden Globe Awards
Self - Audience Member
1944

TV
Golden Globe Awards
Self - Nominee
1944

TV
Golden Globe Awards
Self - Presenter
1944

TV
LIVE with Kelly and Mark
Self - Guest
1988

TV
ER
Karen Hines
1994

TV
King of the Hill
Mrs. Hanover / Pretty Student (voice)
1997

TV
Late Night with Conan O'Brien
Self - Guest
1993

TV
RuPaul's Drag Race
Self - Guest Judge
2009

TV
The Price Is Right
Self
1972

TV
The Ellen DeGeneres Show
Self
2003

TV
Intimate Portrait
Self
1993

TV
Matlock
Victoria Rollins / Laura Norwood
1986

TV
CSI: Vegas
Catherine Willows
2021
TV
The Tony Danza Show
Self
2004

TV
Stars in the House
Self
2020

TV
Tales from the Crypt
Vicki
1989

TV
The Larry Sanders Show
Susan Elliot
1992
Filmography
2021TVCSI: Vegasas Catherine Willows2020TVStars in the Houseas Self2019TVAll Riseas Lisa Benner2019FilmThis Changes Everythingas Self2019FilmA Dog's Journeyas Hannah Montgomery2017FilmAlmost Friendsas Samantha2015FilmCSI: Immortalityas Catherine Willows2014TVIntelligenceas Lillian Strand2013TVUnder the Domeas Christine Price2009FilmWonder Womanas Hera (voice)2009TVRuPaul's Drag Raceas Self - Guest Judge2008FilmColumbus Dayas Alice2007FilmMr. Brooksas Emma Brooks2004FilmIn Good Companyas Ann2004TVThe Tony Danza Showas Self2003TVThe Ellen DeGeneres Showas Self2000TVCSI: Crime Scene Investigationas Catherine Willows2000FilmErin Brockovichas Donna Jensen2000FilmPerfect Murder, Perfect Town: JonBenét and the City of Boulderas Patsy Ramsey2000TVPerfect Murder, Perfect Townas Patsy Ramsey1999TVThe Early Showas Self1999FilmLethal Vowsas Ellen Farris1999FilmHappy Face Murdersas Jen Powell1998FilmGiving Up the Ghostas Anna Hobson1998FilmThanks of a Grateful Nationas Jerrilynn Folz1998FilmSpecies IIas Dr. Laura Baker1997FilmGold Coastas Karen DiCilia1997FilmFire Down Belowas Sarah Kellogg1997TVThe Viewas Self1997FilmThe Last Time I Committed Suicideas Lizzy1997FilmMurder Live!as Pia Postman1997TVKing of the Hillas Mrs. Hanover / Pretty Student (voice)1996FilmMy Fellow Americansas Joanna (uncredited)1996FilmConundrumas Det. Rose Ekberg1995FilmInflammableas Lt. (j.g.) Kay Dolan1995FilmSpeciesas Dr. Laura Baker1995FilmBad Boysas Alison Sinclair1995FilmJust Lookingas Darlene Carpenter1994TVERas Karen Hines1994FilmWhere Are My Children?as Vanessa Meyer Vernon Scott1994FilmLie Down with Lionsas Kate Nessen1994FilmThe Cowboy Wayas Margarette1994FilmKeysas Maureen 'Kick' Kickasola1993TVIntimate Portraitas Self1993FilmPartnersas Georgeanne Bidwell1993TVFrasieras Emily1993TVLate Night with Conan O'Brienas Self - Guest1993TVFallen Angelsas Eve Cressy1993FilmWhen Love Kills: The Seduction of John Hearnas Debbie Banister1993FilmDistant Cousinsas Connie1993TVThe Tommyknockersas Bobbi Anderson1992FilmThrough the Eyes of a Killeras Laurie Fisher1992TVThe Larry Sanders Showas Susan Elliot1992FilmIn Sickness and in Healthas Mickey1991FilmCrooked Heartsas Jennetta1991FilmDeath Dreamsas Crista Westfield1990FilmBlind Vengeanceas Virginia Whitelaw1989FilmAlwaysas Rachel1989FilmAfter Midnightas Alex (segment "All Night Operator")1989FilmPeacemakeras Mrs. Cooper1989TVTales from the Cryptas Vicki1988TVLIVE with Kelly and Markas Self - Guest1988FilmChina Beach: Pilotas K.C. Kolowski1988TVChina Beachas KC Koloski1987TVthirtysomething1987TVShell Game1986TVMatlockas Victoria Rollins / Laura Norwood1985TVSpenser: For Hireas Nancy Kettering1981TVThis Week1975TVPeople's Choice Awardsas Self - Presenter1972TVThe Price Is Rightas Self1944TVGolden Globe Awardsas Self - Audience Member