Spoilers will be up to the current episode!
I've tried to compile a list of major unanswered questions. We can start checking them off as the episodes air!
1. What is the monster?
2. Who is Jacob?
3. Who is the Man in Black?
4. What's up with the numbers?
5. What's up with Desmond's time traveling?
6. What's up with the pregnancy issues on the island?
7. Who are the Adam and Eve skeletons?
8. What's up with Walt?
9. What's the final piece to Libby's backstory?
10. What's Claire up to?
11. What's up with the supply drop? (seems to have been dropped)
12. What does Ilana's team want?
13. What's in the Temple?
Help would be appreciated.. and no I'm not talking about stuff like: Does Kate choose Sawyer or Hurley?
And obviously the answer to "what happened after the bomb went off" will be answered in about a second
I had the same idea for this thread and foolishly wrote it up in Word before seeing if anyone else had done it. Seeing as I tried to think of every mystery the show has presented, including the trivial ones (to me at least), like Kate choosing between Jack and Sawyer, it ended up being fairly comprehensive. So if you don't mind, I'll throw it out below so it doesn't go to waste.
The italicized questions are the ones I feel have been answered already. If anyone wants to argue that a particular question isn't actually answered satisfactorily...well, the forum needs some more life in it.
Oh, and I divided them up by season, since I thought it'd also be fun to reminisce on the mysteries we speculated on in previous years and have long been answered. It was pretty surprising to me to see how many of the foundational mysteries of the show, ones that still haven't been fully explained, originated in season one.
Season One
--
Why did the plane crash?
--What’s the monster?
--“Where are we?” (Charlie)
--
How is the Island undiscovered in this day and age?
--
Who is the French woman?
--
Where did the Polar Bears come from?
--Why was the plane off course?
--
What did Kate do?
--
Will Sayid and Nadia—the girl in his picture—end up together?
--
Are Boone and Shannon really brother and sister? They seem flirty.
--
Is Rose’s husband really dead?
--What happened to all the hair-brushes (that’s for
Temis)
--What happened to Christian’s body?
--What’s up with Ghost Christian?
--What’s up with the infection?
--What’s up with the whispers?
--Who are Adam and Eve?
--
How did Locke get in the wheel chair?
--How/why did the island heal Locke?
--
Who is the real Sawyer? Will James ever get his revenge?
--What’s so special about Walt?
--
What was Jin really doing for Sun’s father? Is he a hit-man?”
--
What’s in the hatch?
--
Who is Ethan?
--Who are the Others?
--
What’s Ethan’s fascination with Claire about?
--Why does Aaron have to be raised by Claire?
--
What happened to Claire when she was kidnapped by Ethan?
--
What’s the Black Rock?
--
What’s up with the Nigerian Drug Plane?
--
Where’s Rousseau’s signal transmitting from?
--
What does the cable on the beach connect to?
--
What happened to Alex and will Rousseau ever see her again?
--Who will Kate end up with: James or Jack?
--What’s up with the numbers?
--
Who torched the raft?
--Why do the Others kidnap Walt?
--How did the Black Rock end up in the middle of the Island?
Season Two
--
Who is Desmond?
--
What is the Dharma Initiative? Where did they go?
--
Is the button real?
--What’s up with the hiroglyphics?
--Why do the Others kidnap children?
--What’s up with the lists?
--Why do the Others kidnap most of the Tail-Section Survivors?
--
What’s the story behind Rose and Bernard?
--
What happened to Michael after he ran into the jungle?
--What’s up with the line the Others tell the survivors not to cross?
--What does Jack plan on doing with his army?
--Where did the parachute of Dharma food come from?
--Why was Libby in the same mental institute as Hurley?
--
Did Sun cheat on Jin?
--
Will Sun ever find out it was Charlie who dragged her through the jungle, at Sawyer’s behest?
--
Is Henry Gale an Other?
--What’s the story behind the real Henry Gale?
--
What’s up with the invisible map Locke sees?
--
How many hatches are there?
--
Why does Dr. Candle change his name between orientation videos?
--
How did Dr. Candle lose his arm?
--
Will Desmond and Penny ever end up together again?
--
What happened to Locke, Eko and Desmond after the Hatch imploded?
--
Why to the Others want Jack, Kate and Sawyer?
--What’s the deal with the four-toed foot?
--
Did Michael and Walt get off the Island for real? Why did they have to follow such a specific heading?
Season Three
--
Is Juliet completely in league with Ben or is she doing her own thing?
--
How do the Others come and go from the Island?
--What’s Room 23?
--
Who’s the eye-patch guy seen in the camera in the Pearl Station?
--
What’s the story behind Ben?
--Who is Jacob?
--Is Sawyer’s daughter important at all to the story?
--Why do pregnant women on the Island die?
--
Who is the old woman Desmond met in his trip back in time?
--
Is Charlie really going to die?
--
What’s up with Ben’s “Magic Box”?
--How did Locke’s Dad end up on the Island?
--
Why do the Others think Locke is so special?
--What was that in Jacob’s Cabin? Why does he need “help”?
--Why is there ash around the cabin?
--
Did Ben really see someone there or was he faking it?
--Why does Richard never age?
--What’s the temple?
--
Will Jack find out Claire is his half-sister?
--
Who is Sun’s baby-daddy?
--
Will Sun survive the pregnancy?
--
Is the Flight 815 found on the bottom of the ocean real?
--
What’s Naomi’s agenda?
--
What’s the freighter’s agenda? Will they really try to kill everyone?
--
Who does Kate have to get back home to in the flash-forward?
--
Who’s in the coffin?
Season Four
--
Who are the members of the Oceanic Six?
--
How do the Six get off the Island?
--
Why does Kate have Aaron?
--
Is Jin really dead?
--What’s up with Hurley seeing and talking to dead people now?
--Why was Daniel crying when he saw the 815 footage?
--
What’s up with the time-experiments Daniel performs?
--Why are people on the Freighter going crazy?
--
What’s Widmore’s significance to the Island? What’s his rivalry with Ben about?
--
How did Ben get off the Island in the flash-forwards?
--
How is Desmond Daniel’s Constant?
--
Why did Richard appear periodically in Locke’s life?
--Why did Jack get sick with appendicitis when the Island heals?
--What’s up with the Frozen Donkey Wheel? How does it work?
--Why does Claire tell Kate not to bring Aaron to the Island in the flash-forwards?
--
How did Locke die in the flash-forwards?
--What happened to Claire/why did she wander off with Christian and leave Aaron?
--
What happened to those left behind on the Island?
--
How are the Six going to get back?
Season Five
--
Who is trying to get Aaron from Kate?
--When will Sun and Jin reunite?
--What exactly is Richard’s role with the Others?
--Why was the Six’s return necessary to the survival of the seemingly happy survivors?
--What role does the Island still have in store for Desmond?
--
What’s the deal with Eloise?
--
How did Ben oust Charles as the leader of the Others?
--What’s the deal with Ilana and the other Ajira passengers with her?
--Can you really change the future, or is it set, as Daniel says?
--Who is the Man in Black?
--Is he the same as the Smoke Monster and faux-Locke?
--What’s his relationship to Jacob?
--What was the significance of Jacob’s visits to the characters?
--What happened when the bomb went off?
Season Six
--Did the X timeline come about because of the bomb or something else?
--How will it intersect with the timeline we know?
--How did the Island sink in the X timeline?
--Why is Desmond on the plane with a wedding ring, then disappears?
--How do faux-Locke and Richard know each other?
--Who are these new Others at the Temple and what do they want with the survivors?
--What does is mean that Jin could be “one of them”?
--What does it mean that Sayid and Claire have been “claimed”?