Since then, its most familiar name behind the camera, JJ Abrams, has gone onto even bigger things, steering the 'Star Trek' reboot into success and now bringing 'Star Wars' to a new generation of fans.
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Naveen Andrews and Evangeline Lilly were just two actors who found worldwide fame with 'Lost'
Co-creator Jeffrey Lieber has been busy with 'Necessary Roughness' and 'NCIS: New Orleans'. The third member of the team Damon Lindelof is behind George Clooney's latest film 'Tomorrowland', as well as scripting 'Prometheus' and helming HBO's 'The Leftovers'.
Meanwhile, though, others remain preoccupied with working out just what was occurring on that strange island, following the arrival of the surviving passengers of Oceanic Airlines Flight 815 on what APPEARED to be an uninhabited tropical paradise.
With thanks to LostMysteries.Blogspot.UK, a tireless bloggers' website - where many of the puzzles that shrouded 'Lost' in mystery have been dissected to the majority of readers' satisfaction - here are eight of the biggest mysteries that remain unsolved to this day...
8 'Lost' Mysteries We Still Haven't Solved
Why was the Frozen Donkey Wheel place not frozen when the wheel was built?(01 of08)
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Theories include... Maybe years of turning the wheel and jumping through time has worn it's power down... Because Man in Black took the light... Because it's not the same frozen donkey wheel place? after all "this isn't the only well on this island" or something along those lines are spoken to Desmond by Smokie before he throws his ass down the well
What happend to Man In Black inside the Light's cave?(02 of08)
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Theories include... His soul has been 'claimed'... He turned into the smoke monster, isn't that enough?... The Island extracted Man In Black's soul/essence from his body
Who was "the Woman" who raised Jacob and Man In Black?(03 of08)
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Theories include... She was the previous Jacob, the guardian of the light... Maybe she was the smoke monster before the MIB... What if she is the Egyptian God of Fertility? She has to be something of power to be able to make it so that Man In Black will not have to worry about death, and being able to make it so that Jacob and Man in Black could not hurt each other
If Man In Black has been appearing as Christian, how did we see Christian off island?(04 of08)
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Theories include... Man in Black could get off the island, but it was meaningless until he had executed his loophole or perhaps 'destroy the cork' as he wants to kill all the candidates and sink the island... It was just Jack hallucinating... Maybe Locke lied to Jack and has never been Christian
Why did Man In Black push Desmond?(05 of08)
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Theories include... - Because Man in Black knows that Desmond is a threat to his plan... He doesn't want to kill him but he does want him contained. He is very surprised that Desmond is not afraid. He can guess that there's something very special about Des, so he kind of imprisons him... He knew Desmond was there on a mission by Widmore to destroy him
How does Charles Widmore know about the alternative reality?(06 of08)
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Theories include... As a man of faith he has simply done what he has been told to do by bringing Desmond back to the island. All he knows is that Desmond is able to harness the EM energy somehow and he hopes to use that to defeat Man in Black... The "true" leaders of the Others have this knowledge... Further to Widmore's early meeting with Faraday. Faraday had brain-damaging technology that Widmore wanted to use. Desmond was probably one of Faraday's first victims after he got Widmore's backing
Who is Penny's mother?(07 of08)
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Theories include... Zoe... Juliet... Eloise could be her mother and 'Mr. Milton' would be her father
What is the sacrifice that Charles Widmore wants Desmond to make?(08 of08)
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Theories include... He is going to infiltrate the Man in Black team obviously. And......kill him or keep him on the island... Desmond is the "bridge" between the two timelines... Jacob told Widmore that Desmond was the "failsafe"to ensure that the Smoke Monster could not leave the island
So is that all cleared up now?
'Lost' Series 1 to 6 are available on DVD boxset or digital download. Watch the trailer for the final series below...