

Together in 2018, Barry and Helena attempt to take over Hotel Memory. Helena returns to 2018 to warn Barry that storming Hotel Memory won’t work. Helena realizes that in a previous timeline, she had invented time travel inadvertently, and Slade had killed her to gain control of the technology. During this timeline, she meets Barry, and together they plan to stop Slade. Believing Slade is dangerous, Helena uses the tank to travel back in time and goes into hiding.

Slade is not satisfied and pushes the team to invent a deprivation tank that makes it possible to literally reenter memories by dying in the present and traveling back in time. She creates a chair that allows the subject to re-experience a previously recorded memory. In 2007, Helena Smith, a neuroscientist specializing in memory, begins working for Marcus Slade on an isolated oil rig.

A grief-stricken Barry prepares to raid Hotel Memory. Overwhelmed by the memory of dying as a teenager, Meghan commits suicide. Once Barry reaches the day he visited Hotel Memory in the previous timeline, the memories from that timeline “catch up,” so Julia, Meghan, and everyone affected by the alternate timeline gain additional memories. He relives his life all the way through 2018. While investigating Ann’s false memories, Barry is enticed to the strange Hotel Memory, where business magnate Marcus Slade captures him and forcibly sends him back to the day Meghan died in 2007. Barry has lunch with his ex-wife, Julia, on what would have been their late daughter Meghan’s 26th birthday.
