Liz Vassey (born August 9, 1972) appears as then young aspiring actress Barbara Whitmore, a close associate and assistant to Marilyn Monroe, in the Season 5 episode of Quantum Leap (TV series) titled "Goodbye Norma Jean". Among her numerous TV acting roles, Liz played the role of Monica Wyatt on the ABC-TV series Castle. She may be best known for her role on CSI as Wendy Simms (2005-2010) and Emily Ann Sago on All My Children.