In this first episode, Welsh sweethearts Mady and Nathan are interested in bringing another woman into their relationship, a process that begins by having a threesome. Also keen to open up their relationship are married couple Jon and Danielle from Bolton. They're interested in having group sex, but are unclear whether this will help overcome the demons of their past.

Welsh couple Liam and Stacey want to try to open up by fulfilling a special fantasy of Liam's - watching Stacey have sex with another man. Whether the reality measure will up to his imagination remains toi be seen. West Midlands couple Alex and Lydie want to date other people to spice up their own love life. However, coming to an agreement on each other's boundaries with strangers proves easier said than done.