Susan Michaela Sullivan (born November 18, 1942) is an American actress, with credits in daytime and prime-time programs. Sullivan is best known for her roles as Lenore Curtin Delaney on the daytime soap opera Another World (1971–76), as Lois Adams in the ABC sitcom It's a Living (1980–81), as Maggie Gioberti Channing on the primetime soap opera Falcon Crest (1981–89), as Kitty Montgomery on ABC sitcom Dharma & Greg (1997–2002), and as Martha Rodgers in Castle (2009–present).