Millions of viewers will watch Sergeant Catherine Cawood () and Tommy Lee Royce () across Yorkshire in the ultimate showdown.
Sunday night’s episode finished with Tommy Lee Royce (James Norton) revealing his plans to flee to Spain with his son Ryan (Rhys Connah), with police no closer to closing the net on the escaped convict.
Over the past few weeks, social media has been flooded with theories and questions about how the show will end.
Ahead of the last ever episode, we take a look at some of TV’s finest moments which have left viewers shocked, heartbroken and on the edge of their seat.
The finale: Happy Valley will come to its grand conclusion on Sunday