In the early days at Hill House, Hugh made discoveries when clearing the basement of black mould.
Ruth shifts between the past and the present, as the kid turns up at her house.
The investigation into Peter's death finds a suspect. Anna knows her father's secrets; more than even Jim understands.
Bill enlists Jerome and Holly to help with Olivia's computer.
Meanwhile, a tragedy occurs.
Annie finds out secrets about Eddie. She's also still getting the run around from Welland. All the while she talks to the mysterious Riddler on her own.