Christian Slater and Molly Brown chat with ET about ‘Dexter: Original Sin,’ streaming Dec. 13 on Paramount+. Christian reflects on the serial killer motif across his career, starting with 1988’s cult classic, ‘Heathers,’ to Dexter Morgan’s origin story. Nearly 20 years after fans first met their characters, the actors share their approach to putting new spins on Harry and Debra Morgan, played by James Remar and Jennifer Carpenter in the original series