Jeanne Marie Tripplehorn (born June 10, 1963) is an American film and television actress. Her film career began with the role of a police psychologist in the erotic thriller Basic Instinct (1992), The Firm (1993), and Waterworld (1995). On television, Tripplehorn had the lead role of Barbara Henrickson in the HBO drama series Big Love (2006-2011), and later portrayed Dr. Alex Blake on CBS police procedural Criminal Minds (2012–2014). Tripplehorn was nominated for a Primetime Emmy Award for her performance as Jacqueline Kennedy Onassis in the 2009 HBO movie Grey Gardens.