Lost has landed on Netflix, introducing a new generation of viewers to one of the most misunderstood endings of all time. When the finale first aired on 23rd May 2010, fans either loved or hated the divisive two-parter. Throughout the six season run, Lost followed the survivors of Oceanic Airlines Flight 815 after they crashed on a mysterious tropical island complete with underground bunkers, polar bears and a monster composed of smoke.

Through flashbacks, flash-forwards and eventually a flash-sideways, we get further insight into each character as the show progresses, while still keeping the overall narrative moving forward to its climax. Some of the two-part finale takes place on the island itself, with the final showdown against the Man in Black and the fate of the island up for grabs. These events play out as they do, but it’s in the flash-sideways where questions arise, and controversy exists, namely with the question people still ask to this very day – were they dead the whole time? Luckily, we’ve broken down the huge plot twist for you below.

Read on for a breakdown of the ending of Lost . The best sci-fi news and features this side of the Outer Rim. By entering your details, you are agreeing to our terms and conditions and privacy policy .

You can unsubscribe at any time. Lost ending explained: What exactly were the flashsideways? Like the rest of Lost, the series finale jumps between events on the island itself, and in this case, a flash-sideways – an alterna.