As another day of fantasy plays out in Westworld, where guests pay top dollar to share wild-west adventures with android hosts, programmer Bernard Lowe alerts park founder Dr. Robert Ford about incidents of aberrant behaviour cropping up in some recently re-coded hosts.

First-timer William and repeat visitor Logan arrive at Westworld with different expectations and agendas. Quality Assurance debates whether a recent host anomaly is contagious, and a madam in Sweetwater's brothel has her emotions tweaked in order to avoid a recall.

Elsie and Stubbs head into the hills in pursuit of a missing host. Teddy gets a new backstory which sets him off in pursuit of a new villain, leaving Dolores alone in Sweetwater. Bernard investigates the origins of madness and hallucinations within the hosts.

Dolores joins William and Logan on a bounty hunt in the badlands. The Man in Black, with Lawrence in tow, finds a critical clue in his search to unlock the maze. Dr. Ford and Theresa discuss the future of the park. Maeve, meanwhile, is troubled by a recurring vision.

Dolores, William and Logan reach Pariah, a town built on decadence and transgression - and are recruited for a dangerous mission. The Man in Black meets an unlikely ally in his search to unlock the maze.

Elsie uncovers a possible source of sabotage while Bernard searches for clues to anomalies in a sector thought to be abandoned. Theresa questions Ford's leadership while Lee encounters a new arrival at Westworld. The Man in Black and Teddy run afoul of a Union garrison.