Phase Space (Westworld)

The episode opens with Bernard speaking to Dolores. Bernard appears confused as Dolores corrects him and reveals she is testing him for "fidelity".

Maeve and her group survive the attack by the shōgun's army. Akane ceremoniously cuts out Sakura's heart and they return to the occupied village. Musashi secures their safe passage by killing Tanaka, the shōgun's lieutenant, in a duel. They reach the shrine at Snow Lake where Lee, Felix and Sylvester locate the access point while the hosts attend Akane's ceremony. Maeve suggests that Akane and Musashi come with them, but they decline, opting to make their own choice; Musashi gives Hanaryo permission to go.

Maeve's group returns to Westworld, emerging near the farmstead where Maeve had previously lived with her daughter. She asks the others to stay behind as she heads towards the farmstead where she discovers that another host is playing the mother role. A Ghost Nation raiding party attacks and Maeve flees with her daughter. While Hector and the other hosts come to their aid, Akecheta—leader of the raiding party—tells Maeve that they should come with him, as they are looking for the same thing.

William rides with his gang and his daughter Emily and believes she is a host built by Ford. When they stop for the night, William and Emily have a difficult talk about her mother and her childhood. William promises Emily she can come with them, but Emily wakes the next day to find William and the others have left her behind. Elsewhere, William and his gang run into a Ghost Nation ambush.

Dolores and the Horde prepare to take the train to the Mesa. When one security officer is unable to identify where Delos would have taken Peter, Teddy, now reprogrammed to be ruthless, executes him. They set the train loaded with explosives at full speed, planning to crash into the Mesa's entry terminal.

Charlotte and Ashley bring Peter to the Mesa, allowing Charlotte to call for armed backup. A unit of armed mercenaries led by Coughlin arrive and take over from Delos' security forces. They bring Westworld's systems online in time to see the train barreling down on the Mesa.

Bernard and Elsie make their way back to the Mesa, and discover that the Cradle, the central repository of host data, has somehow hijacked the park's systems, and that they must physically go there to find the source. Bernard uses a host-interface machine to enter into the Cradle's system and look for the anomaly. He experiences a pre-uprising Sweetwater, and on entering the saloon discovers Ford waiting for him.

"Phase Space" was watched by 1.11 million viewers on its initial viewing, and received a 0.4 18–49 rating, marking a series low in viewership.[1]

"Phase Space" received very positive reviews from critics. At Rotten Tomatoes, the episode has a 97% approval rating with an average score of 7.24/10, from 33 reviews. The site's critical consensus reads: "'Phase Space' shocks with a surprising character return and a gratifying answer to one of Westworld's biggest riddles, leading to further gripping questions."[2]

• "Phase Space" at HBO.com
• "Phase Space" on IMDb
• "Phase Space" at TV.com