Everything Sarah has fought for hangs in the balance.

Downey and Amos converge as the race to find Dinah reaches a breaking point. Sarah must take a leap of faith.

A dangerous game of cat and mouse begins on the train to Scotland. Sarah and Zoë try piecing together Dinah's exact location.

 Zoë makes a startling discovery that expands the scale of the conspiracy. Sarah and Downey trek north, revealing their pasts along the way.

While hiding out, Sarah learns more about Downey. Zoë ruffles feathers as she seeks new collaborators for her investigation.

Sarah winds up on an unexpected road trip. Zoë begins pulling threads left behind by Joe and suspects something bigger is at play.

Zoë goes digging for answers as Sarah starts to spiral. Hamza is under pressure to keep a lid on the crisis.

A catastrophic event upends South Oxford. Sarah grows suspicious of the emergency response. While investigating, she encounters Zoë Boehm.