Set in Miami, the series centers on Dexter Morgan, a forensic technician specializing in bloodstain pattern analysis for the fictional Miami Metro Police Department, who leads a secret parallel life as a vigilante serial killer, hunting down murderers who have not been adequately punished by the justice system due to corruption or legal technicalities.
According to Nielsen Media Research, the episode was seen by an estimated 2.25 million household viewers and gained a 1.1 ratings share among adults aged 18–49.
Dexter (Michael C. Hall) visits Debra (Jennifer Carpenter), telling her he cannot kill Hannah (Yvonne Strahovski) as she asked him.
Debra reiterates that she is responsible for many murders, including Sal Price, even playing his recorded interview with her, where she confessed to killing a woman with Wayne Randall.
Isaak (Ray Stevenson) evades the police following him, allowing himself the chance to try to kill Dexter near a donut shop, but misses the shots.
Astor (Christina Robinson) and Cody (Preston Bailey) arrive in Miami to stay with Dexter while their grandfather undergoes surgery.
She takes an interest in Dexter's boat, especially as he suddenly moved out of his usual marina around the time of the Bay Harbor Butcher's discovery.
Club gave the episode a "B+" grade and wrote, "It's a sign of a television show's strong footing when it can sell you on choices you initially balked at.
And when that show is Dexter, which at its nadir served up about a dozen dubious choices per episode, it's pretty exhilarating to feel that sense of confidence again.
"[6] Richard Rys of Vulture gave the episode a perfect 5 star rating out of 5 and wrote, "Let's take a moment to give the writer some props.
"[9] Esther Gim of BuddyTV wrote, "This week's episode, titled "Argentina," brings out all of Dexter's relationships and turns them upside down.
"[10] Billy Grifter of Den of Geek wrote, "Overall, this was one of the strongest Dexter stories for some time, though the somewhat manic mood changes did make it play like an odd combination of noir and farce.
There wasn't a lot of movement on the Hannah McKay front and Deb opened up about her feelings for her brother, easily the most ridiculous and misguided storyline in show history.
"[12] Alex Moaba of HuffPost wrote, "I will say that I'll be impressed with the writers' gumption - though not necessarily their wisdom - if they steer the show into the genuinely bizarre territory that would result from Deb and Dexter actually sleeping together.