For two weeks, four couples swapped partners and flew to Thailand to live with their new "husband or wife" in this experiment, which aimed to see if relationship problems could be fixed by learning from other couples. This reality show is as chaotic as it sounds, but in the best possible way. Expect arguments, tantrums, so many tears, and, quite honestly, some really touching moments. Seven Year Switch doesn't just exist in the UK; it has some jaw-dropping versions in the USA and Australia, too; both are also worth a watch.
Watch it on All4.