According to Nielsen Media Research, the episode was seen by an estimated 0.370 million household viewers and gained a 0.1 ratings share among adults aged 18–49.
The episode received extremely positive reviews from critics, who praised the character development, the introduction to Xavier, performances, cinematography and pacing.
Thirty years prior to the events of the series, Gabrielle Haller (Stephanie Corneliussen) cares for her son David in a mansion, while her husband Charles Xavier (Harry Lloyd) constantly leaves for an important trip.
Alone in the mansion, Gabrielle starts experiencing delusions as well as to hearing voices, which turn out to be from the future versions of David (Dan Stevens) and Switch (Lauren Tsai).
"[5] Lloyd described his version of the character as a more ambiguous figure, explaining, "The way we play that leading scene he kind of abandons his wife.
"[6] In its original American broadcast, "Chapter 22" was seen by an estimated 0.370 million household viewers and gained a 0.1 ratings share among adults aged 18–49, according to Nielsen Media Research.
Club gave the episode a "B+" grade and wrote, "'Chapter 22' occasionally achieves a kind of tone-poem beauty, a finely textured character study of the sort that made for the high points of seasons one and two.
"[10] Nick Harley of Den of Geek wrote, "'Chapter 22' is a fine reintroduction to Charles Xavier, but an even better episode of Legion.
"[11] Kevin Lever of Tell Tale TV gave the episode a perfect 5 star rating out of 5 and wrote, "The portrayal of time travel, of the longing in David's pleas for his mother's attention throughout the timeline and the mess he may cause himself, is some of the most compelling work the show has done.
Coupled with the human and touching story of Charles and Gabrielle falling in love, 'Chapter 22' finds itself as one of the very best of Legion, and one well worth revisiting to uncover its secrets.