Original Sin charts Dexter's early years, but it also features his brother, and the future Ice Truck Killer, which could lead to a future spin-off.

Dexter: Original Sin's penultimate episode is full of twists and turns, as Dexter targets Aaron Spencer, and Brian Moser stalks a target..

Young Dexter Morgan will experience a “defining moment” during the season finale of Dexter: Original Sin, teases Patrick Gibson, adding that “something will shape him into the Dexter that fans know.” The Irish actor plays the titular character in the prequel series.