Premise: Lumen Ann Pierce is a fictional character portrayed by Julia Stiles in the Showtime television series Dexter , season 5 . Lumen is introduced in the third episode ( `` Practically Perfect '' ) as a survivor of rapist-serial killer Boyd Fowler . She remains for the rest of the season , and leaves following the season 5 finale , `` The Big One '' . In season 5 , episode 5 , `` First Blood '' , Lumen is revealed to have been beaten and gang raped by a group of men , including Boyd Fowler . She witnesses Dexter Morgan kill Fowler , and thus becomes a key player in Dexter 's life .
Hypothesis: Lumen Pierce has only ever appeared in books.
Label: CONTRADICTION