Katie bemoans the lack of intimacy in her marriage, Jamie objects to Hugo's views on fidelity and Carolyn is frustrated by her inability to get pregnant.

Dave and Katie argue over the need for therapy; Carolyn convinces Palek to keep trying for a baby, although he may be losing interest; Jamie still has trust-issues with Hugo; May reaches out to an old flame.

Jamie and Dave meet with Dr. Foster. A secret from Carolyn's past haunts Palek.

Carolyn and Palek redouble their efforts. Jamie considers Nick. May addresses Katie and David's problems.

Dave and Katie talk about the lock. Carolyn Palek want to end therapy. Nick returns to see Jamie.

Katie and Dave find themselves home alone. Carolyn Palek find a buyer for the house. Hugo returns to Jamie and she must decide between him and Nick.

Dave and Katie ponder the future of their therapy. Palek's has doubts about Carolyn. Jamie cannot open up to Nick.

Palek's anxiety grows. Jamie must come clean with Nick. Katie receives some disturbing news.

May gets some bad news. Jamie goes after Hugo. Palek reveals a secret. Dave and Katie must settle their differences.