Margaret Doversola was the principals Performers Casting Director for Lost for Season 2, 3, and 4 replacing Anna Fishburn. Doversola was succeeded by Rachel Sutton in Season 5 [1]. Doversola also worked with Julie Carlson, who is the background actors casting agent for all seasons thus far. She can be seen on Lost: The Complete Third Season (DVD), in the feature "Lost in a Day", locating a Scottish actor for "Catch-22".