According to Nielsen Media Research, the episode was seen by an estimated 0.315 million household viewers and gained a 0.1 ratings share among adults aged 18–49.
The scene then is interrupted by a three-year time jump, with a glimpse of Oliver (Jemaine Clement) and Melanie (Jean Smart), who now live in the ice cube, with both noting that Syd (Rachel Keller) was betrayed by David.
The scene then jumps to a dream sequence where David winds up in his childhood bedroom, with a Narrator (Jon Hamm) explaining certain concepts on a television.
David alters her memories, while Division 3 agents arrive at the scene to retrieve them, capturing Farouk by placing him a device to stop his powers.
The Vermillion accuse him of his future crimes for the potential apocalypse he will cause, as well as the fact that David sexually assaulted Syd by erasing her memories and having sex with her.
In May 2018, it was reported that the eleventh and final episode of the season would be titled "Chapter 19", and was to be directed by Keith Gordon and written by series creator Noah Hawley.
"[5] In its original American broadcast, "Chapter 19" was seen by an estimated 0.315 million household viewers and gained a 0.1 ratings share among adults aged 18–49, according to Nielsen Media Research.
The site's consensus states: "'Chapter 19' defies expectations for Legion's complicated characters, although the series' ability to continue weaving the web it's spun seems uncertain.
"[8] Ryan Matsunaga of IGN gave the episode an "amazing" 9.4 out of 10 and wrote in his verdict, "If the first season of Legion was the story of a hero coming into his powers, the second turned out to be a compelling look at a villain discovering his destiny.
"[9] Oliver Sava of Vulture gave the episode a 3 star rating out of 5 and wrote, "I applaud Legion's willingness to commit to this heel turn for David.
Club gave the episode a "C" grade and wrote, "This is upsetting, disturbing stuff, and for the first time since I began watching this weird and often wonderful show, I'm not convinced Legion is capable of telling the story it just waded into.
"[12] Alan Sepinwall of Rolling Stone wrote, "The climax isn't an exact unintentional metaphor for Legion Season Two itself – but it's close.
The series isn't evil so much as it is fairly drunk on its own creative powers, where trying to be even slightly easier and cleaner might do it and its audience a world of good.
"[13] Ben Travers of IndieWire gave the episode a "B" grade but criticized David's actions, writing, "It involves the very concept Noah Hawley is putting under the microscope: how audiences can be so ready to identify with a hero, they're willing to root for him when he stops doing good.
"[14] Darren Franich of Entertainment Weekly gave the episode a "B-" grade and wrote, "Predictably, everyone who went to the desert wound up getting lost — or, in a sight gag that really emphasized the 'gag', getting pulled around on a rickshaw.
Its long-planned reveal, staged as a twist, was so heavily foreshadowed that it was easy to predict, but it also happened so perfunctorily that it felt like the show had thrown it together at the last minute.
The site wrote, "As the star of FX's trippy superhero drama, Stevens has raised the bar for all comic-book TV performances, with his troubled mutant David Haller struggling to harness his formidable powers while battling a devastating mental illness.