1991 Miami prequel series "Dexter: Original Sin" casts Christina Milian, James Martinez, Alex Shimizu, Reno Wilson, Patrick Gibson, Christian Slater, and Molly Brown.

Dexter: Original Sin prequel series casts Christina Milian, James Martinez and Alex Shimizu as younger versions of Maria LaGuerta, Angel Batista and Vince Masuka, with Reno Wilson joining in a new role. The prequel, set in 1991 Miami, follows a young Dexter (Patrick Gibson) before he becomes the notorious serial killer. Christian Slater will play Harry Morgan, Dexter's adoptive father, and Molly Brown as Debra Morgan, Dexter's younger sister.