As Endeavour and Thursday deal with the heartbreak of Joan's departure, a death at East Cowley Slipper Baths hurls the pair into another dark adventure.

Endeavour is charged with protecting Joy Pettybon, self-appointed guardian of the nation's morals, who is visiting Oxford to promote her 'Keep Britain Decent' campaign.

Endeavour is tasked with protecting prisoner and criminal informant Terry Bakewell whilst he's undergoing treatment in Cowley General Hospital.

When a body is found in a marshland outside of Oxford, everyone assumes they're the remains of Oxford botanist Matthew Laxman, who disappeared near the site five years earlier.