Open House: The Great Sex Experiment: Episode 3 (Channel 4, Friday, May 23, 2025)

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Channel 4’s “Open House: The Great Sex Experiment” continues its exploration of non-monogamous relationships, following couples as they test the often-turbulent waters of ethical non-monogamy. This Friday’s episode introduces new couples and new dilemmas, asking whether opening up a relationship can truly strengthen it – or drive a wedge between partners.

We meet Claude and Amy, an Essex couple with six children between them, already masters of the complicated blended-family dynamic. Now, they’re adding another dimension: multiple intimate partners. While Amy seems to take to the arrangement with relative ease, Claude wrestles with guilt, a common stumbling block on the road to non-monogamy.

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Meanwhile, Welsh couple Jonny and Sarah hope that Marie, a French lingerie model, will be the key to unlocking their own exploration of intimacy outside their relationship. Marie’s Gallic charm is clearly a draw, but her motivations for participating remain unclear. Will she be a helpful guide or an added complication?

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“Open House” doesn’t offer easy answers or pat resolutions. Instead, it presents the messy reality of relationships in flux, forcing viewers to consider their own preconceptions about love, commitment, and the ever-evolving definition of partnership. Tune in to Channel 4 this Friday, May 23 at 10:00 PM GMT.

Isabelle aka Izzy Jacobs is the features editor at memorabletv.com. Isabelle is particularly drawn to crime dramas, but she also has a not so secret love for all things reality TV. In addition to her work at memorabletv.com, Isabelle is also an avid traveler and a devoted foodie.