2. Episode 2

The couples focus on repairing toxic communication styles & learn non-verbal communication is as important as what is said. But change is hard, & for Dom & Carla, memories of their honeymoon fuel a major dispute.

3. Episode 3

Sex takes centre stage as the couples explore passion and intimacy. Darren and Laney revitalise their relationship with a trip to the trapeze school, while Alison's 50th birthday party leads to an unexpected breakthrough.

4. Episode 4

As the experiment ends, an apology from Alison could make or break her relationship with Paul. Inhibitions are lowered during a kissing contest in a crowded mall, and the surprising final scores are revealed.