High Quality Content by WIKIPEDIA articles! "The British Invasion" is the twelfth episode and finale of the second season of the American television drama series Dexter, which first aired on December 16, 2007 on Showtime in the United States. The episode was written by Daniel Cerone (based on a story by Cerone and Melissa Rosenberg) and was directed by Steve Shill. In the episode, Lila Tournay (Jaime Murray) finds Sgt. James Doakes (Erik King) imprisoned in an Everglades cabin and learns from him that her object of affection, Dexter Morgan (Michael C. Hall), is the serial killer known as the "Bay Harbor Butcher". She decides to help Dexter and kills Doakes by setting the cabin on fire. Meanwhile, Dexter`s sister Debra (Jennifer Carpenter) questions whether her career is more important than her relationship with FBI Special Agent Frank Lundy (Keith Carradine).