Channel 4's new Scotland-based drama Summerwater

A 'stressful' Channel 4 thriller has left viewers with 'anxiety through the roof' in its debut. Summerwater stars Harry Potter actress Shirley Henderson - aka Moaning Myrtle - and follows interconnected storylines of holidaymakers in the Scottish Highlands. Taking place over 24 hours, viewers see the story told from multiple characters' perspectives. Some of the show's audience were left perplexed by the thriller's storytelling - sharing their thoughts online.