LOST the last season

Season six centered on the consequences of the detonation of the hydrogen bomb, in an attempt to change the past.
Referred to as the flash sideways, this place shows the passengers of Oceanic Flight 815 as well as several other main characters reunite and come to terms with their respective lives and deaths and move on into the afterlife.
The Man in Black continues to execute his plan of leaving the island after Jacob's murder.
The history between The Man in Black and Jacob and the nature of the island is explored.
Jacob's candidates learn that Jacob has been present throughout their lives and has guided them to the island.
The Temple and its residents, under the leadership of Dogen and Lennon, are introduced.
The formation of three sides: The Man in Black's recruits, who wish to leave the Island; Jacob's followers, who oppose the Man in Black, and worry about his destructive nature; and Charles Widmore, who returns to the Island with Desmond Hume and attempts to prevent The Man in Black from fulfilling his plan.

Similarities between Season 1 and Season 6

• Both the first season and the last season open with a 2-part episode, which are multi-centric.
• Jack, Cindy and Rose are the first characters featured in the first ever flashback on the series, and the first seen in the flash-sideways in season 6.
• The first episodes of Season 1 ("Pilot, Part 1") and Season 6 ("LA X, Part 1") open with Jack's point of view and are multi-centric.
• The second episodes of Season 1 ("Pilot, Part 2") and Season 6 ("LA X, Part 2") are multi-centric.
• The third episodes of Season 1 ("Tabula Rasa") and Season 6 ("What Kate Does") are Kate-centric.
• The fourth episodes of Season 1 ("Walkabout") and Season 6 ("The Substitute") are Locke-centric.
• The fifth episodes of Season 1 ("White Rabbit") and Season 6 ("Lighthouse") are Jack-centric.
• The sixth episodes of Season 1 ("House of the Rising Sun") and Season 6 ("Sundown") contain the word "Sun" in the title, however this is the first time this season that the centricity is not the same. "House of the Rising Sun" was Sun-centric.
• The eighth episodes of Season 1 ("Confidence Man") and Season 6 ("Recon") are Sawyer-centric, and both contain the word "con".
• The final scene of Jack dying in the bamboo field in the last episode ("The End") mirrors the opening scene of Lost in reverse. YouTube

This is the official trailer :