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Marg Helgenberger

BURBANK, CA - MAY 19: Actress Marg Helgenberger arrives at the Disney Media Networks International Upfronts at Walt Disney Studios on May 19, 2013 in Burbank, California.

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About Marg Helgenberger

Mary Marg Helgenberger (born November 16, 1958) is an American film and television actress known for her roles as Catherine Willows in the CBS drama CSI: Crime Scene Investigation, and as K.C. Koloski in the ABC drama China Beach, which earned her the 1990 Emmy Award for Outstanding Supporting Actress in a Drama Series.

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