**Dexter: Original Sin** is an American crime drama mystery television series and a prequel to the acclaimed *Dexter* franchise, created by Clyde Phillips for Paramount+ and Showtime. The series premiered on December 13, 2024, and explores the formative years of Dexter Morgan in 1991, approximately fifteen years before the events of the original *Dexter* series (2006–2013)[2][6]. Set in Miami, the show follows **young Dexter Morgan** as he grapples with his burgeoning homicidal urges under the strict guidance of his foster father, Harry Morgan, a detective who attempts to channel Dexter's violent impulses into a vigilante code. This early mentorship is pivotal, as Harry tries to help Dexter live a "normal" life while secretly training him to kill only those who have evaded justice, a principle that defines Dexter's moral framework throughout the franchise[2][3][5]. The series delves into Dexter's social struggles, his first kills, and the psychological complexities that shape him into the infamous "Bay Harbor Butcher." Produced by Clyde Phillips Productions, Sal Centric, Counterpart Studios, and Showtime Networks, *Dexter: Original Sin* was initially renewed for a second season in April 2025, though this renewal was later canceled in August 2025, reflecting mixed responses despite the show's ambition[2][5]. Critically, the series has been praised for its compelling storytelling and strong performances—particularly Patrick Gibson as young Dexter and Molly Brown as Debra—who bring depth to well-known characters, while also introducing new faces and expanding the Dexter mythology[4]. The show balances familiar motifs from the original series with fresh narratives, including real-life serial killer stories from the early ’90s, enhancing its dark, suspenseful tone[5]. Current production continues, with filming locations in Miami and Los Angeles, aiming to maintain authenticity and atmosphere integral to the franchise's identity[5]