Sinead Cusack

Adapted from the novel by John Banville. After the death of his wife, Max returns to the sea where he spent his childhood summers, provoking a cathartic reflection as the present draws out powerful memories of innocent joy, uplifting warmth, and profound tragedy from one fateful summer many years ago. Only an unforeseen revelation will provide a path to redemption and closure.

Unable to locate Matthew, Marcella begins another line of inquiry, looking more closely at Grace's brother, Henry. Jason's suspicions are also aroused, and he decides to confront Henry at his home.

Marcella interviews Peter Cullen in hopes of closing the case on the 2005 murders. Jason gets his job back at DTG Construction, but he struggles to move past Grace's death.

The detectives get a new lead in the Grove Park Killer case when an elderly man narrowly escapes becoming the next victim. Meanwhile, Marcella notices a taxicab on the CCTV footage from outside of Grace's house, and she interrogates the driver.

Mo confronts Marcella about his brother's murder, and Marcella makes a startling confession. Jason's suspicious involvement with Andrew Barnes brings him under police scrutiny, while the evidence against Yann begins to disintegrate.

As Caden spirals, Kathryn learns the dark secrets of Max's media empire.

Kathryn dedicates herself to Caden's recovery as Max looks to the future.

While Max is thrust into the public eye, Caden prepares to sacrifice himself.

Kathryn and Caden plan to take on Max - who is working on a strategy of his own.