In Dexter, the titual serial killer Dexter Morgan has a biological son named Harrison Morgan, and while Dexter's kid has appeared in every season of the show since season 4, including the sequel Dexter: New Blood, several actors have played him. At the end of season 4, Harrison’s mother, Rita (Julie Benz), is murdered, and he is left to be raised by his serial killer father. In the Dexter series finale, a slightly older Harrison is left in the care of Dexter's love interest and fellow killer Hannah (Yvonne Strahovski), who raises him in Argentina after Dexter is presumed dead.
https://screenrant.com/dexter-harrison-morgan-actors-every-who-played/