Open House is back with a bang, with a sexy gang of new residents and a new open relationship expert. Mark and Tanith from Yorkshire want to find out if having sex with other people can help build trust, which has been under threat due to Mark's past cheating. Married couple Chloe and Paul from Liverpool are childhood sweethearts who've never had sex with anyone except each other. Now they want to see if an open relationship can allow Chloe to explore whether she might also be attracted to women. But how will Paul react if she is? 

The new series continues, as committed couples explore whether having open relationships and sex with other people can strengthen their bond. Essex couple Claude and Amy have a blended family of six children and want to form long-term sexual and emotional relationships with as many partners as possible. But first, they have to see if Claude can overcome his guilt issues and be sexually intimate with another woman. Meanwhile, Welsh couple Jonny and Sarah have fallen for the gallic charms of French lingerie model and resident Marie, but will she agree to help them finally have sex with other people?