The Attic

Echo, Priya and Anthony have been placed in the Attic and are suspended in a permanent dream-state where they relive their worst nightmares over and over again. But Echo eventually realises that the nightmares aren't real and manages to escape them to a surreal world where she's suddenly attacked by a shadowy figure.

Escaping, she encounters Dominic, the former security chief. They fight but both realise the other is real. Dominic explains he's after Echo's attacker, Arcane, who's been killing people in the Attic dreamworld. He shows Echo how to travel from mind to mind and they rescue Priya and Anthony from their nightmares, and manage to trap Arcane, using Priya as bait.

Surprisingly, the shadowy creature is revealed as Clyde, one of the two original founders of Rossum, who was betrayed by his partner. He's trying to bring down the Rossum system by killing the people whose brains are used to run the mainframe. He must prevent the post-apocalyptic future he predicts from coming true. Clyde explains that a clone has been made of him and that he can't remember his partner's name. However, a woman had seen them when she'd broken into their offices. Echo realises that woman is Caroline!

Echo, Priya and Anthony deliberately get themselves killed to be disconnected from the Attic system. Echo awakes, revives the others and heads for DeWitt's office. But rather than exact revenge, Echo reports to DeWitt that her mission has been successful! DeWitt had sent her in to the Attic to discover Rossum's dark secret. In the office, Priya, Anthony, Topher, Ivy, Boyd and a revived Ballard, have united to overthrow the corporation. And Echo declares that it's time for them to meet Caroline!