Following up on this past weekend's video chat with Michael C. Hall and John Lithgow on the Dexter season four finale (see that here), Lithgow also took part in a separate hour long live-streaming interview session, which Showtime has posted in it's entirety. We advice you to avoid it if you haven't seen the season finale yet as it is SPOILER HEAVY. (If you've seen it - please spare other readers from the conclusion while talking about it in our comments section below!)If you're a fan of the show, then this is definitely worth investing an hour to watch. Dexter stars Michael C. Hall, Jennifer Carpenter, Julie Benz, James Remar, David Zayas, Lauren Vez, C.S. Lee, Desmond Harrington, Courtney Ford and John Lithgow.