"1958-11-16Z"^^ . . "American actress" . . "1958Z"^^ . "1982Z"^^ . "Mary Marg Helgenberger"@en . . "Helgenberger, Marg"@en . . "Mary Marg Helgenberger (born November 16, 1958) is an American actress. She is best known for her roles as Catherine Willows in the CBS drama CSI: Crime Scene Investigation (2000\u20132012, 2013) and the subsequent TV movie Immortality (2015) and as K.C."@en . "Mary Helgenberger"@en . . "Helgenberger, Mary Marg (full name)"@en .