After recruiting Sayid to his cause, the Man in Black issues an ultimatum to the Others: either join him or die. Meanwhile, Kate is reunited with Claire. In the flash sideways, Sayid helps his brother, who is in debt to a loan shark.

The episode was rated 7.57 from 1002 votes.

On Jacob's orders, Hurley leads Jack to a lighthouse. Meanwhile, Claire questions an Other she has captured while tending to an injured Jin. In the flash sideways, Jack is a single father trying to bond with his son.

The episode was rated 7.65 from 1002 votes.

On the island, the Man in Black attempts to recruit Sawyer in his attempt to leave the island, while an impromptu funeral is held for the real Locke. In the flash sideways, Locke is fired from his job and becomes a substitute teacher.

The episode was rated 7.70 from 1011 votes.

Ilana discovers Ben killed Jacob, so she plans to kill him. Meanwhile, Jack, Hurley and a suicidal Richard visit the Black Rock. In the flash sideways, Ben, a high school teacher, tries to blackmail the school's principal.

The episode was rated 7.71 from 1003 votes.

The survivors split into two groups; one led by Sawyer, the other by the Man in Black. Sawyer's group travels to Hydra Island, where they are captured by Widmore's crew after Sun and Jin are reunited. In the flash sideways, the passengers of Oceanic 815 continue to cross paths with each other.

The episode was rated 7.79 from 1023 votes.

In order to prevent more loss of life, Hurley leads the other survivors to speak with the Man in Black. In the flash sideways, Hurley meets Libby, while Desmond continues his mission to let the Oceanic 815 passengers know of their lives on the island.

The episode was rated 7.79 from 976 votes.

Jacob and the Man in Black are revealed to be twin brothers. They are raised by a mysterious woman who is charged with protecting the island. As revenge for the murder of their adoptive mother (who killed their real mother), Jacob throws his brother into the source of electromagnetism after being made the island's guardian, which transforms the Man in Black into the smoke monster.

The episode was rated 7.84 from 1022 votes.

Ben finally takes his revenge on Widmore after accepting the Man in Black's request for assistance. Jacob explains the purpose of the candidates, and Jack volunteers to take his place. The search for Desmond reveals that he has been rescued and the Man in Black plans to use him to destroy the island. In the flash sideways, each person ends up on their way to a concert.

The episode was rated 7.85 from 999 votes.

Two outcomes of the detonation of the hydrogen bomb are presented. Flight 815 lands safely at LAX, where Kate escapes from the marshal and Jack learns that his father's body was lost in transit.

The episode was rated 7.89 from 1054 votes.

On the island, Widmore subjects Desmond to a large amount of electromagnetic energy as an experiment. In the flash sideways, Desmond, with the aid of Charlie, starts to have visions of his life in the original timeline.

The episode was rated 7.91 from 1019 votes.

Jack, Sawyer, Kate, Miles and Hurley, struggling to save Sayid, face an ancient secret. Meanwhile, a fake Locke exits the chamber to everyone's awe.

The episode was rated 7.94 from 723 votes.

After the remaining survivors are reunited, Sawyer and Jack hatch a plan to divert the Man in Black's attention and leave the island without him on Widmore's submarine, but disastrous consequences await them. In the flash sideways, Jack investigates the cause of Locke's paralysis and offers treatment.

The episode was rated 8.02 from 1013 votes.

The Man in Black's final fate is determined, and one survivor must make the ultimate sacrifice to save the island. Meanwhile, in another life, the ones who might have been the survivors gather for a final time.

The episode was rated 8.06 from 828 votes.

Richard Alpert's back story is shown: In 1867, he is brought to the island on the Black Rock as a slave. He makes a deal with Jacob to be his representative in exchange for immortality. In the present day, Hurley convinces him to help the candidates replace Jacob and stop the Man in Black from leaving the Island.

The episode was rated 8.07 from 1042 votes.

In the gripping finale of Lost, titled "The End," viewers are taken on an emotional rollercoaster as Jack and the Man in Black face off in a battle for the island's fate. With Desmond's pivotal role in extinguishing the island's light, chaos ensues as the island begins to disintegrate. Despite the Man in Black becoming mortal, his desperation to escape leads to a brutal showdown with Jack, resulting in Jack's sacrifice to save his friends.

As Jack makes the ultimate sacrifice to relight the heart of the island, the poignant realization of his destiny unfolds. Hurley steps up as the new protector of the island, with Ben by his side as the advisor. The episode delves into themes of sacrifice, destiny, and the enduring bonds of friendship as the characters navigate life and death, culminating in a poignant and tear-inducing conclusion that lingers with viewers long after the credits roll.

The intricate layers of the flash sideways are unveiled, revealing a profound limbo where the characters find solace in accepting their past and present, allowing them to "let go" and "move on" together. As the series comes to a close, the poignant imagery and heartfelt performances capture the essence of love, redemption, and closure, leaving a lasting impact on fans who have journeyed alongside these characters through the highs and lows of their island adventures.

The episode was rated 8.11 from 1945 votes.