"When we match a couple, we'll be looking at all sorts of elements, like their personality style, what they're like under pressure, can they compromise, what is their communication style like, are their values similar? We're looking at all sorts of things. And then when we place them into the experiment, what we find is how they cope under pressure. Some of them cope very well; others do not. Often they go back to their default positions, and then things start to unravel.
"The wonderful thing about this experiment is that it really is unpredictable. We don't orchestrate it, these couples are in there doing their best, to learn, to get close, to create intimacy and to ultimately be together forever — but we're not entirely sure how they're going to go. So with Jono and Clare, we saw that with the pressure of the experiment, the way they resolve their issues, or don't resolve their issues . . . It started to become much more fragile."