Kathleen Rose Perkins is an American actress. Her career began in 2001 with a role in the television series The Fighting Fitzgeralds. She had a recurring role as Principal Duffy in the Fox sitcom 'Til Death, and has made guest appearances in over 20 other television series, including NCIS: Los Angeles, Trust Me, Gary Unmarried, Tell Me You Love Me, Castle, The Game and The Exes, among others. She has a starring role as Carol Rance in the BBC-Showtime comedy series Episodes.