A flash sideways is not a flashback, flash-forward or an alternate timeline. It posits what would have happened if Oceanic flight 815 didn't crash on the island but instead landed in Los Angeles.
Flash Sideways gallery | "LA X" episode guide
Flash Sideways Differences
1. Plane stabilizes; Rose tells Jack it's okay to let go.
The plane stabilizes after turbulence and continues safely to Los Angeles. However, in "Pilot," "The Other 48 Days" and "A Tale of Two Cities," flight 815 rips apart after the turbulence and crashes on the island.
Read related recaps:
Pilot | The Other 48 Days | A Tale of Two Cities
Watch related episodes:
Pilot | The Other 48 Days | A Tale of Two Cities
2. Bernard returns to his seat.
Bernard returns to his seat and to Rose, but in "The Other 48 Days," Bernard is in the tail section and his row of seats is caught in tree.
Read related recap:
The Other 48 Days
Watch related episode:
The Other 48 Days
3. Desmond on plane in Jack's seat.
Jack finds Desmond sitting in his row, but Desmond was never on flight 815. In "Live Together, Die Alone," Desmond is on a sailboat that is caught in a violent storm. He shipwrecks on the island and lives there for three years before 815 crashes.
Read related recap:
Live Together, Die Alone
Watch related episodes:
Live Together, Die Alone, Pt. 1 | Live Together, Die Alone, Pt. 2
4. Island and complete statue underwater.
The island and the whole statue are seen underwater, but in "Pilot," the Others and the survivors live on the island, and in "Live Together, Die Alone," only the four-toed foot remains of statue.
Read related recaps:
Pilot | Live Together, Die Alone
Watch related episodes:
Pilot | Live Together, Die Alone, Pt. 1 | Live Together, Die Alone, Pt. 2
5. Hurley won the lottery and is the luckiest guy alive.
Hurley says he's the luckiest guy alive, but in "Numbers," Hurley thinks he is cursed because he uses the numbers to win the lottery.
Read related recap:
Numbers
Watch related episode:
Numbers
6. Boone wasn't able to bring Shannon back with him.
Boone told Locke that he wasn't able to bring his sister back with him, but in the "Pilot" and "Hearts and Minds," Shannon does come back with him and they are on the plane together.
Read related recaps:
Pilot | Hearts and Minds
Watch related episodes:
Pilot | Hearts and Minds
7. Oceanic 815 lands in LA.
Oceanic 815 lands safely in Los Angeles, but in "Pilot," "The Other 48 Days" and "A Tale of Two Cities," flight 815 crashes on island.
Read related recaps:
Pilot | The Other 48 Days | A Tale of Two Cities
Watch related episodes:
Pilot | The Other 48 Days | A Tale of Two Cities
8. Jack is informed that Oceanic lost his father's coffin.
Oceanic lost the coffin with Jack's father, but in the first season episode "White Rabbit," Jack found the coffin on the island. However, the body of his father was not in the coffin.
Read related recap:
White Rabbit
Watch related episode:
White Rabbit
9. Sun does not speak or understand English.
Sun tells the customs agent she speaks no English, but in the first season episode "House of the Rising Sun," Sun was secretly taking English lessons so she could leave Jin at the Sydney airport, and on the island reveals to Michael that she actually can speak English.
Read related recap:
House of the Rising Sun
Watch the related episode:
House of the Rising Sun
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