Rose wants an extremely reluctant Harry to watch the baby while she's on a "sex date" with her new boyfriend, while Billy and Zoey make plans to celebrate Gaia Day.

Harry becomes jealous of Billy an Jonathan's new bond, while Rose tries to spice things up with Bruce.

Rose tries to put Harry's 'single dad powers' to good use, while Zoey, Michelle, Janet and Jonathan confront their bedroom fantasies.

Harry and Rose tell Rose's judgmental mother a lie in order to keep her happy; and Michelle and Zoey turn to Jonathan for help preparing their wills

Harry conquers a dating obstacle that brings Rose's insecurities to a fore; at the same time, Michelle and Billy find themselves drawn into Zoey's war on sugar.

Harry hopes to raise the families' opinion of him by introducing them to his delinquent older brother Frank, but Harry soon realizes he may be the family black sheep after Frank charms everyone.

Baby Charlie isn't meeting his milestones fast enough.

Rose, Charlie and Harry see a new doctor. Janet and Jonathan accidentally invites Zoey and Michelle for a dinner party.

Harry finds himself in uncharted waters dating-wise. Meanwhile, Anastasia learns to drive and Billy tells the truth.

Harry and the kids prepare to celebrate Father's Day when a shocking mix-up at the sperm bank threatens to tear the family apart.