Warning: SPOILERS lie ahead for Dexter: Original Sin season 1, episode 10!Dexter: Original Sin revealed that Captain Aaron Spencer (Patrick Dempsey) was behind Nicky’s kidnapping, which took actor Patrick Gibson by surprise. Original Sin serves as a prequel to the beloved Michael C. Hall-led series, following a young Dexter Morgan as he transitions into a serial killer with a vengeance. The cast of Original Sinincludes Gibson in the titular role alongside Dempsey, Christian Slater, James Martinez, and Christina Milian.