In the present, it deals with Dolores and the Man in Black separately amassing their own armies to fight off the impending security teams from Delos and to destroy the "Pearly Gates" respectively.
Critics praised the flashback sequences, Evan Rachel Wood's performance and Giancarlo Esposito's surprise appearance.
William takes him to the park and convinces him that they can use the hosts to gather data on the guests and use it to further the Delos Corporation's business interests.
He heads to Pariah to recruit the host currently playing the outlaw El Lazo to deal with amassing Confederado forces.
At the Confederados base, Dolores demonstrates her apparent god-like ability to bring dead hosts back to life, gaining their loyalty as she leads them to "the Valley Beyond".
She shows Teddy the same spot that William had shown her years earlier, telling him the site houses a weapon they can use against the humans.
He was cast due to Anthony Hopkins being a fan of Esposito's portrayal of Gus Fring on AMC's television series Breaking Bad.
Unabia, as Juliet, had been shown in the first season's pilot episode, "The Original", as the woman at Times Square in the photograph that Peter found and caused him to fall out of his loop.
[4] During the flashback showing Logan Delos' first contact with Ford and Arnold's first hosts, a piano cover of "Runaway" by Kanye West plays in the background.
After he asks her to play "anything but fucking Chopin", she switches to the Gershwin piece "The Man I Love", which had already been performed earlier in the episode by host Clementine at the demonstration for Logan.
The site's consensus reads "'Reunion' moves Westworld forward with a fascinating look back, shedding light on the park's mysterious origins to answer some important questions and raises a few new ones.
[10] Ron Hogan of Den of Geek UK said the episode had "a beautifully wrought script" and that "battle lines continue to be drawn in Westworld season 2".