Max and Felix's big day arrives -- and so does the drama as secrets are revealed, confessions are made, and poorly timed punches are thrown.

The gang is forced to put on their happy faces and reconnect at Max's swanky engagement party, where "severe awkwardness" is everybody's plus-one.

The gang attends an extreme funeral, Ethan gets an earful from Felix, and the awkward encounters keep on coming for Lisa.

Sam tries to halt Jon's shaming campaign. Ethan and Lisa take a stroll down nostalgia lane. Nick makes an effort to act his age.

Max wants a bachelor party that's, you know, classy. But Max ought to know -- you can't always get what you want.

When Ethan and Sam go public, Marianne, Nick and Max take the opportunity to practice their "casual faces." Lisa receives shocking news.

Sam, Nick and Marianne put on their dancing shoes. Lisa makes a surprising find. Max pushes Ethan to dip his toe into the dating pool.

Lisa and Charlie consider their future. Nick invites Lisa to crash his weekend with Merrill. Felix orders Max to stand up to Ethan.

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.

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

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

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

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

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

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.