Open House: The Great Sex Experiment

Engaged couple Tom and Lauren have been trying to open up their relationship, but stage fright has meant that Tom has struggled to rise to the occasion. If he cannot perform, might it signpost the end of their relationship? Alex's confidence is rattled after watching partner Alana have wild sex with resident Georgie. He still hopes to bounce back from this setback to fulfil their dream of a full couple swap.

Chris and Simon, the retreat's first gay couple, are engaged to be married. Neither of them have ever had sex with a woman before, but as they approach their big day Simon wants to explore whether or not he might be bisexual and work out what that means for his identity and their relationship. Meanwhile, Tom has erectile concerns and is wondering whether participation in an orgy might help. He and his fiancée Lauren consider whether to have sex away from each other in separate rooms with resident couple Gage and Olivia.

Married couple Sharmayne and Jamie want to open up but are both very anxious because they've had so little sexual experience with other partners. As their future at the retreat hangs in the balance, Jamie is left wondering if they can move forward together. Engaged gay couple Simon and Chris are trying to have sex with women. After a hot tub date with residents Jen and Naomi, Simon decides he's keen to take things further, but Chris is hesitant.

Married couple Ashley and Tanya are seasoned swingers, but there's one boundary the Leeds couple have never previously crossed - trying to seduce and have sex with other people on their own without the other one present. After nearly walking out of last night's social, Jamie and Sharmayne still aren't sure how far they can go, so non-monogamy coach Effy orchestrates a sexy pool party to help them loosen up. After a cocktail date with resident couple Jen and Marc, they're forced to make the ultimate decision.