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

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

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.

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.

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

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.