According to Nielsen Media Research, the episode was seen by an estimated 0.795 million household viewers and gained a 0.4 ratings share among adults aged 18–49.
Kerry (Amber Midthunder) is taken to Summerland, where Cary (Bill Irwin) takes care of her wound until she wakes up.
David (Dan Stevens) shows Syd (Rachel Keller) that he created an illusion where both can spend time together and not worry about her powers, thanks to his knowledge of the astral plane.
Melanie explains that Oliver has spent 21 years in the plane, and asks David to help him return to the real world.
In February 2017, it was reported that the fifth episode of the season would be titled "Chapter 5", and was to be directed by Tim Mielants and written by co-executive producer Peter Calloway.
"[3] In its original American broadcast, "Chapter 5" was seen by an estimated 0.795 million household viewers and gained a 0.4 ratings share among adults aged 18–49, according to Nielsen Media Research.
The site's consensus states: "The terrifying 'Chapter 5' sends Legion spinning upside down while thrillingly weaving threads of horror into the show's comics-inspired canvas.
One supposes that Cary's magic collar will come to the rescue at some point, but for now it seems the more pressing issue is for our heroes to find their way back to reality... if they even exist at all, that is.
Club gave the episode an "A-" grade and wrote, "Everyone in Legion believes in someone or something for different reasons, but they're all driven by that same hope, of finding what they want to see.
"[9] Kevin P. Sullivan of Entertainment Weekly wrote, "Legion does a lot of things well... but I think it's worth talking about more specifically after an episode like 'Chapter 5'.
""[10] Oliver Sava of Vulture gave the episode a 3 star rating out of 5 and wrote, "Legion is by no means a realistic or nuanced interpretation of schizophrenia, but the way it ties the main villain to the illness is fascinating.
The site wrote, "As Legion's conflicted mutant David Haller, Dan Stevens has been stuck in his own mind (literally) most of the season.
Wearing a sly smile, David stormed through Division 3 laying waste to enemy soldiers, and Stevens made the mutant's newfound cockiness positively unnerving.