Aimee Garcia

Off the Map star Aimee Garcia has joined Dexter, a show rep tells TVGuide.com.

Garcia will play Jamie, the younger sister of Batista (David Zayas) whom Dexter (Michael C. Hall) hires as a nanny for baby Harrison. No word yet on what happened to Sonya (Maria Doyle Kennedy), Harry's au pair last season.

Colin Hanks joins Dexter

Garcia is the latest to join the Showtime drama for the upcoming sixth season. Earlier this week, Colin Hanks signed on to play Dexter's nemesis, while Mos (formerly known as Mos Def)  will recur as an ex-con.

TV Line was the first to report the casting.