Claim: Lumen Pierce is a character from Dexter.

`` The Big One '' is the fifth season finale of the American television drama series Dexter , and the 60th overall episode of the show . It originally aired on Showtime on December 12 , 2010 . In the episode , Dexter attempts to save Lumen from Jordan Chase , as his sister , Debra , comes closer to uncovering the truth in her investigation . Meanwhile , Quinn falls under suspicion for Dexter 's murder of Stan Liddy .   The episode was directed by Steve Shill , and the teleplay was written by former showrunner Chip Johannessen and executive producer Manny Coto . It marked the conclusion of the season-long subplot pertaining to Lumen seeking revenge against Jordan Chase , and marked the last in a string of regular guest appearances by Julia Stiles and Jonny Lee Miller , who played Lumen and Chase , respectively .