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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.
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.
