Noah and Helen try for amicable divorce proceedings, but complications reveal inescapable conflict. Plus, surprising developments in Helen's life reveal unexpected emotions. Season premiere.

Alison's summer with Noah is interrupted. Cole's lifestyle causes concern.

Noah's unrestrained love for Alison has serious consequences. Meanwhile, Alison discovers a surprising truth about how to sustain a marriage.

As pressures in Helen's life mount, one innocent mistake leads to outrageous consequences. Meanwhile, a court order presents a dire setback for Noah and Alison.

Alison's eyes are opened when she discovers how Noah has characterized her in his novel. She searches for him at the brownstone, where Helen delivers a poignant message. She retreats to Montauk, where she reconnects with Cole. Unbeknownst to her, Cole has made a platonic connection with a new character, Luisa, which we can see has potential to become more. In a flash forward, Noah's attorney receives a tip about Scotty's murder from an unlikely source.

A medical emergency casts Helen and Noah's litigation process in a new light, causing Helen to make a long overdue decision. The dynamic of Noah and Alison's relationship shifts as troublesome discoveries are made.

Alison confronts Noah about his book. Revelations further alienate Cole.

On the college campus where they first met, Helen is amazed to see Noah in a new role, and bewildered by Whitney's future plans. Meanwhile, Noah is in danger of spinning out of control as his fame and related temptations escalate.

Alison weathers a momentous journey alone. Helen receives unexpected attention from a sexy yet exasperating source. Noah faces a terrible reckoning. An array of challenges pushes Cole to the very edge.

Noah grapples with essential questions. Alison begins to doubt a recent ambition, and renewed interactions with the Lockhart brothers force her to consider harrowing possibility.

Cole and Luisa take a serious step forward. Meanwhile, a series of revelations cause Noah to reconsider everything he thought he knew about Alison, and a momentous decision Alison makes may just end their relationship.

The truth about the fatal night is finally revealed, what happened and why? In the current time-line, Noah is forced to make a decision.