Lumen Pierce appears on the TV show Dexter.
Dexter is an American television crime drama mystery series that aired on Showtime from October 1 , 2006 , to September 22 , 2013 . Lumen Ann Pierce is a fictional character portrayed by Julia Stiles in the Showtime television series Dexter , season 5 . She goes out on her own and shoots one of her attackers , but panics not knowing what to do with his body ; she calls Dexter , who reluctantly helps her cover up the murder .