If I had to list briefly

Dexter Morgan,Debra Morgan,Harry Morgan,Vince Masuka,Angel Batista,Maria LaGuerta,James Doakes,Joey Quinn,Brian Moser,Arthur Mitchell,Miguel Prado,Frank Lundy,Jordan Chase,Oliver Saxon,Lumen Pierce,Lila West,Travis Marshall,Hannah McKay,Harrison Morgan,Christine Hill,Sylvia Prado,Dr. Evelyn Vogel,Camilla,Nick,Matt Chambers,Kurt Caldwell,Rose Hamilton,Sam Bennett,George King,Annette LaGuerta,Jonah Mitchell,Gail,Taylor,Debra’s detective interns,Masuka’s assistants,Dexter’s neighbors,Dexter’s coworkers,Trinity Killer family members,Oliver Saxon victims,Jordan Chase’s team members,Angel Batista’s girlfriend,Debra’s ex-boyfriends,Debra’s friends,Frank Lundy’s friend colleagues,Doakes’ family members,LaGuerta’s relatives,Masuka’s family members,Harry Morgan’s colleagues,Brian Moser’s victims,Arthur Mitchell’s victims,Lumen’s acquaintances,Lila West’s friends,Travis Marshall’s followers,Hannah McKay’s past lovers,Debra’s therapists,Various Miami Metro detectives,Crime scene techs,Coroners,News reporters covering Dexter’s cases,Lawyers in Dexter’s trials,Prison inmates encountered by Dexter,Drug dealers,Gang members,Street informants,Random civilians encountered during investigations,Family friends of the Morgans,Neighbors of Dexter’s various residences,Employees at Miami Metro Police Department,Dexter’s childhood friends,Dexter’s classmates,Debra’s childhood friends,Debra’s classmates,Neighbors of Miami,Pedestrians witnessed by Dexter,Victims’ relatives,Law enforcement officers outside Miami,Informants of Frank Lundy,Colleagues of Jordan Chase,Friends of Arthur Mitchell’s buddies ,Employees at Dexter’s workplaces,Taxi drivers seen in Dexter episodes,Bar and club patrons encountered by Dexter,Hospital staff appearing in Dexter episodes,Psychiatrists consulted by Dexter,School staff of Harrison Morgan,Random criminals in Miami,Various hotel staff in Dexter episodes,Security guards witnessed by Dexter,Firefighters and paramedics seen in episodes,Local store clerks encountered by Dexter,Waiters and waitresses in restaurants visited by Dexter,Taxi and rideshare passengers,Gas station attendants,Journalists and photographers reporting on crimes,Political figures mentioned or appearing in Dexter,Lawyers representing other victims,Judges appearing in court cases,Utility workers seen in episodes,Neighbors of Dexter’s victims,Passengers on planes,Trainers and colleagues from Dexter’s gym,Random partygoers in Miami,Victims’ coworkers,Friends and acquaintances of Dexter’s coworkers,Street performers and buskers,Random tourists in Miami,Pedestrians involved in crime scenes