The Best Episodes Written By Zal Batmanglij

While BBA and the others converge on the clinic, Nina persuades Hap to show her his research, and Karim unlocks one of the house's final secrets.

Karim visits Nina at the clinic for help finding the secret entrance to the house. Meanwhile, Hap meets a fellow traveler, and Homer goes on a date.

While private eye Karim Washington scours San Francisco for a missing teen who was involved in a cryptic game, OA wakes up in unfamiliar surroundings.

Darby plays the role of the perfect guest in order to covertly investigate the crime. She finds she may be getting closer to the truth when another life is taken.

The remaining guests gather and discover the killer among them.

Darby believes the death she witnessed may, in fact, be murder, but no one believes her. The grief and shock of the events thrust her into remembering her own buried past.

After OA recounts a dramatic final night at Hap's, the others begin to see her story in a new light. The fragments of the dream click into place.

An ominous new dream and a tense outing with Nancy and Abel take a toll on OA. Steve finds his life in turmoil once again.

A woman missing for seven years turns up at a hospital with strange scars on her back but can't -- or won't -- reveal where she's been.

While Hap zeroes in on a new test subject in Cuba, Homer and OA work to perfect their escape plan. Scott reaches his breaking point.

There's a killer on the loose and nowhere to run with a storm closing in. Darby breaks out of lockdown and discovers the retreat may not be what she thought it was.

An amateur sleuth receives a mysterious invitation to a reclusive tech billionaire's secret retreat.

Darby uncovers the secret retreat within the retreat. In the past, she and Bill come face to face with the Silver Doe Killer.