Dana Welles Delany (born March 13, 1956) is an Emmy Award-winning American movie and television actress. She is well known for her role as Colleen McMurphy on the ABC television show "China Beach" (1988–1991), "Katherine Mayfair" on "Desperate Housewives" (2007–2010) and "Megan Hunt" on "Body of Proof" (2011–present).