
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). Description above from the Wikipedia article Marg Helgenberger, licensed under CC-BY-SA, full list of contributors on Wikipedia.
Awards & recognition
- Primetime Emmy Award — Outstanding Supporting Actress in a Drama Series · 1990
- star on Hollywood Walk of Fame
Filmography38 titles

A Dog's Journey

Tales from the Crypt

ER

CSI: Vegas

Frasier

The Larry Sanders Show

CSI: Crime Scene Investigation

RuPaul's Drag Race

China Beach

All Rise

Erin Brockovich

King of the Hill

Wonder Woman

Under the Dome

Matlock

Mr. Brooks

Spenser: For Hire

Bad Boys

Intelligence

Almost Friends

The Price Is Right

This Changes Everything

Always

In Good Company

My Fellow Americans

Species

Conundrum

Fire Down Below

After Midnight

The Ellen DeGeneres Show

Crooked Hearts

LIVE with Kelly and Mark

Species II

The Last Time I Committed Suicide

Columbus Day

Thanks of a Grateful Nation

The View

Lie Down with Lions