The gang gets together to celebrate Sam’s 40th birthday, where Lisa suffers a crisis of conscience and Nick’s announcement catches everyone off guard.

Lisa makes a big decision, Ethan and Sam reminisce about old times, Nick plays a prank, and Max makes an awkward confession.

Tensions flare, suspicions grow and mics drop at a lavish wedding reception, where Ethan takes his new persona out for a spin.

Ethan organizes a wine-tasting trip for his wife and friends, but his perfectly planned excursion hits a few bumps in the road.

Ethan and Lisa run the gauntlet to ensure their IVF is a success. Max and Felix celebrate a special occasion. Sam opens up.

Facing a brutal deadline, Ethan brainstorms ideas for his Y.A. novel. Meanwhile, Sam, Lisa and Marianne meet some admirers out on the town.

Lisa’s new career gets off to a dubious start. Meanwhile, Marianne prepares for a play and Ethan proves himself a less-than-stellar petsitter.

Lisa and Ethan move to New York, reconnect with old college friends and learn that some secrets are harder to keep than others.