Broadchurch (2013)

The soaring, crumbly Jurassic cliffs of West Bay visually dominate this coastal mystery, turning the picturesque Dorset seaside into an amphitheatre of scrutiny. The locals' defensive south-western cadence and close-knit insularity amplify the paranoia following a tragic local death. Detective work here is fundamentally shaped by shoreline geography, where tight physical borders prevent anyone from escaping collective guilt.