Joseph "Joey” Quinn is a fictional character in the Showtime television series Dexter, portrayed by Desmond Harrington.

Quinn's past, as Debra is pressured by Internal Affairs agent Yuki Amado (Liza Lapira) to report him.

He later confesses to Debra that Amado was once his partner and that she blames him for a colleague's death from a crystal methamphetamine overdose; Quinn knew about the man's addiction but tried to offer private help instead of informing his superiors.

However, after Dexter sees Quinn taking money from a crime scene, he tries to shut him up by buying him expensive football tickets.

Meanwhile, Quinn starts a relationship with Christine Hill (Courtney Ford), a reporter who flirtatiously grills him for information on his cases.

Desperate for confirmation Mitchell's son Jonah (Brando Eaton), who was due to enter witness protection, he attempts to have him identify Dexter as Butler, but is caught by marshals and suspended.

Their budding romance hits a snag, until Debra discovers that Quinn was suspended by LaGuerta for investigating Dexter.

To prove his commitment to Debra and dispel her doubts that his feelings for her are real, Quinn tells Liddy to drop his investigation of Dexter.

Liddy delivers to Quinn pictures of Dexter and Lumen Pierce (Julia Stiles) disposing of a body.

Dexter, who killed Liddy to protect himself and Lumen, fakes the blood report so Quinn will be eliminated as a suspect.

He begins drinking heavily and having random one-night stands, once turning up to Debra's housewarming with a girl he flippantly refers to as "chick from the bar," and hitting on Batista's sister Jamie (Aimee Garcia).

His womanizing also affects his work when he endangers the investigation of suspected "Doomsday Killer" Professor Gellar (Edward James Olmos) by sleeping with his assistant, an important material witness.

The club's owner, George Novikov (Jason Gedrick), offers to give Nadia a passport and her freedom if Quinn disposes of blood evidence linking the head of the syndicate, Isaak Sirko (Ray Stevenson), to three murders; if he does not comply, Novikov will send her to a sex club in Dubai.

Frustrated, Quinn tries to prove himself by investigating murder suspect — and Dexter's new "protege" — Zach Hamilton (Sam Underwood).

After Dexter kills Saxon in full view of a security camera, Quinn and Batista bring him in for questioning.