Seven Year Switch Australia

Arriving in their new homes before their experimental partners turn up, the first of many surprises is revealed to the participants: there's just one bedroom and it contains only one bed

On meeting their experimental partners, three of the couples decide it's ladies first as regards use of the bed, but one pair come to a different conclusion and the woman is left to sleep on the sofa

As a way to bond, the experimental couples share interests. One pair learn a dance routine, while one man teaches his new partner the drums before revealing the state of his sex life.

Weekends away involve a helicopter ride and a steamy hot-tub for one experimental couple, learning to let go in Byron Bay for another and the telling of a tragic story for a third

Shocking truths are revealed to the experimental couples as they're shown footage of examples of tension in their original relationships

Bonds of trust have been established between the experimental couples. Now that the project is drawing to a close, the therapists pose the question: are the original relationships worth saving?