The sixth and final season of the American serial drama television series Lost commenced airing in the United States and Canada on February 2, 2010.

[3] The finale ran two-and-a-half hours starting at 9:00 pm—followed by the previously announced post-finale special, Jimmy Kimmel Live: Aloha to Lost, at 12:05 am.

[4] The season continues the story of the survivors of the fictional September 22, 2004 crash of Oceanic Airlines Flight 815 on an island in the South Pacific.

[6] Included in the special features was "The New Man in Charge", a previously unaired shortened episode that serves as an epilogue following the events of the finale.

[7] On May 7, 2007, ABC Entertainment President Stephen McPherson announced that Lost would end during the 2009–2010 season with a "highly anticipated and shocking finale.

"[11] The producers planned to wrap up mysteries, such as the reason the Dharma periodic resupply drops continue after the purge,[12] Walt's unusual abilities,[13] and the "bird" from "Exodus" and "Live Together, Die Alone".

[15] He also claimed to be the only cast member to know the ending of the series,[16] though Lindelof has clarified that Fox only knew things that were relevant to his character.

Returning from the fifth season are the survivors' leader Dr. Jack Shephard (Matthew Fox); former fugitive Kate Austen (Evangeline Lilly); millionaire Hugo "Hurley" Reyes (Jorge Garcia); former torturer Sayid Jarrah (Naveen Andrews); con artist James "Sawyer" Ford (Josh Holloway); medium Miles Straume (Ken Leung); former mob-enforcer Jin-Soo Kwon (Daniel Dae Kim) and his privileged wife Sun Kwon (Yunjin Kim); leader of the island's native population, known as the "Others," Ben Linus (Michael Emerson); deceased crash survivor John Locke, who lives on in the sideways timeline but has been impersonated in the original timeline by the mysterious Man In Black[27] (Terry O'Quinn); and former islander Desmond Hume (Henry Ian Cusick), who starts the season off the island.

[28][29] The new main cast roles are pilot Frank Lapidus (Jeff Fahey), Richard Alpert (Nestor Carbonell), an ageless advisor to the Others, and mysterious Flight 316 leader Ilana Verdansky (Zuleikha Robinson).

[18] Ian Somerhalder reprises his role as deceased Flight 815 crash survivor Boone Carlyle,[34] as does Rebecca Mader as anthropologist Charlotte Lewis.

[35] Harold Perrineau and Cynthia Watros, who portray Michael Dawson and Libby Smith, respectively, return in the second half of the season.

"[43] Numerous recurring characters who reprised their roles for the final season include: Jack and Claire's father, Dr. Christian Shephard (John Terry), wealthy industrialist and former Other Charles Widmore (Alan Dale), Desmond's wife Penny Widmore (Sonya Walger), former Other Eloise Hawking (Fionnula Flanagan), Locke's ex-girlfriend, Helen Norwood (Katey Sagal), Hurley's former boss, Randy Nations (Billy Ray Gallion), mysterious Flight 316 passenger Bram (Brad William Henke), Sayid's wife, Nadia (Andrea Gabriel), deceased Frenchwoman Danielle Rousseau (Mira Furlan), science teacher Leslie Arzt (Daniel Roebuck), deceased one-eyed Other Mikhail Bakunin (Andrew Divoff), the Others' doctor Ethan Rom (William Mapother), Ben Linus' father Roger (Jon Gries), mercenaries Martin Keamy (Kevin Durand) and Omar (Anthony Azizi), and Vincent, a dog who survived the crash of Flight 815 and lives on the island.

[53] L. Scott Caldwell and Sam Anderson reprised their roles as Rose Henderson and Bernard respectively, as does Kimberley Joseph who plays 815 stewardess-turned-Other Cindy.

The website's critical consensus reads, "Lost's shift in central mythology won't satisfy all viewers, but persistent fans will find solace in the show's strong performances and continued dedication to its themes.

[65] The season premiered on February 2, 2010, with a double-length episode (two hours including commercials) preceded by a one-hour clip show, titled "Lost: Final Chapter".