Sophie feels the fallout from the accusations swirling around James, who rallies a longtime friend for support. Kate prepares for her first witness.

Kate questions Olivia about what happened in the elevator as Sophie reels from new information about James and pressure mounts on the prime minister.

Sophie’s suspicions crystallize after James discloses more details of that fateful night at Oxford. An apprehensive Kate awaits the verdict.

James scrambles to mitigate the scandal’s impact, while a devastated but determined Sophie remembers happier moments and Kate debates her next move.

There is a new kind of killer haunting the Oxford twilight. Endeavour and Thursday find the city’s dreaming spires giving way to waking nightmare.