Sarah Michelle Gellar and Patrick Gibson chat with ET about ‘Dexter: Original Sin,’ streaming Dec. 13 on Paramount+ and premiering Dec. 15 on Showtime. Sarah talks about being a big fan of the original series, ‘Dexter,’ and how excited she was to learn of the cast involved, including Christian Slater and Patrick Dempsey. The actress jokes her character, Tanya Martin, is the reason Dexter is such a good serial killer and compares herself to ‘Star Wars’ characters Obi-Wan Kenobi and Darth Vader. Patrick talks about playing a young Dexter Morgan and shares what support he got from Michael C. Hall, who played the title character in the original series.