: Dexter's girlfriend (and later wife) who discovers she is pregnant and must navigate her own secrets, including two previous marriages. Jennifer Carpenter as Debra Morgan
: Miguel’s wife, who develops a close friendship with Rita. dexter season three cast
: A new addition to the cast as a detective transferred from narcotics, who becomes Debra’s partner and a recurring figure in the series. David Ramsey as Anton Briggs : Dexter's girlfriend (and later wife) who discovers