This is a list of all the unanswered questions that have been asked in Lost, both explicitly and implicitly. Please add questions! When possible, make sure to reference that episode that the question comes from. Once a question has been officially answered on the TV show or by some other source, we can remove it from the list.
Characters
Jack
- Where is Jack's dad's body?
- What is the meaning/significance of Jack's tattoo?
- Why was Jack in Phuket?
- Where did he learn to shoot like that?
- Does he have a half-sister, and if so, who is she?
Kate
- Was the horse that Kate saw the same horse from her memory in What Kate Did? If so, how did it get there?
- Who was she married to?
Sawyer
- Who is the real Sawyer?
Sayid
- What happened to Nadia?
Jin
- Did he become healed? If so, how?
Sun
- Is her baby from Jin or her tutor? (OR What was the reason behind her troubled expression when she was hugging Jin?)
Charlie
- What did Charlie's mother mean when she told him he was special?
Claire
- What is so special about Claire that she can be the only one to raise Aaron?
Aaron
- What do the Others want with Aaron?
- What is 'special' about Aaron that made the psychic insist he must not be raised by anyone but Claire?
Michael
- What instructions did he receive on the computer? Where to go? Why exactly did he say that the computer "is not what you think it is"?
- Why did Michael shoot Ana Lucia, Libby, and himself?
- Is he working with or for the Others?
Walt
- Where is Walt?
- Why do the Others want him?
- Did he make that bird die in Special? How?
- Was it really Walt talking to Michael on the computer?
- Why is Walt wet every time we see him since his kidnapping?
- Why has Walt been talking backwards?
Locke
- Why has there been no mention (not just by Locke himself) that Locke had seen the inside of the hatch after Boone died? Also, he disappeared for some time when he saw the light
- How did Locke become healed?
- Why did he initially lie about what happened to Boone?
- Did Locke really see The Security System in Walkabout or did he see something else that was "beautiful?"
- He seems to know about destiny and what's 'supposed to happen', what does he know about the island that he hasn't revealed?
- Since Locke knew himself to be the one who attacked Sayid and destroyed the transceiver, why did he suggest Sawyer did it, then hand Sayid a large dagger with which to *kill* Sawyer?
Mr. Eko
- What do the Bible passages marked on his Jesus Stick mean?
- Why was he going to America?
Hurley
- Why exactly does he have the nickname Hurley? He doesn't seem especially prone to throwing up (hurling)
Libby
- Why was Libby in Australia?
- Why exactly was Libby in the Santa Rosa Mental Health Institute?
Supporting Characters
Rose
- Is Rose really psychic?
- Is she really cured and how?
Cindy
- What happened to Cindy?
- Did The Others really take her and is she still alive?
Danielle
- What is the sickness that she has referred to? Does it have something to do with the Quarantine?
- Does Danielle know more about the island than she has shared? Has she lied about what she has shared?
Desmond
- Where did Desmond go? Is he still alive?
- What was the medicine for that he was taking?
- Who is the "him" that he referred to when he first met Locke?
- Did he mean anything special by “you’ve gotta lift it up”?
- Did he mean anything special by “see you in another life, yeah?”?
- Did he cause a miracle that cured Sarah? Jack was pretty sure he didn't fix her, and she became healed only after Jack spoke with Desmond (who asked if he believed in miracles)
- Why was he photographed with the woman who tried to adopt Claire's baby
Christian Shephard
- How exactly did he die?
- The coffin is empty, and the Island has healing powers. Is he still dead? Was he really dead to begin with?
- Who was the woman he went to see in Australia? Claire's mother?
The Others
General
- Did the Others have a part in the plane crash? If not, then how did they know about it so promptly?
- How did the Others get on the Island?
- Why do the Others disguise themselves when they come in contact with the lostaways?
- Why do the Others want the lostaways to stay on one side of the Island?
- Why did the Others kidnap members of the Tailenders? Why do they want to kidnap the rest of the survivors of Flight 815?
- Why are the Others even on the island?
Alexandra Rousseau
- Is she the girl that rescued Claire in Maternity Leave?
The Doll Trap
Zeke/Mr. Friendly
- What is his real name?
He
- Who is the he that Mr. Friendly refers to?
- Who is the "he" that "Henry Gale" refers to? Is he the same he as Zeke refers to?
Henry Gale
- Why didn't he escape through the vents when he had the chance?
- What, if any, was his relationship with the real Henry Gale?
- How did the real Henry Gale (the man whose body was found buried next to the Balloon) die? Who buried him? And why?
Kelvin
- Was Desmond telling the truth about Kelvin?
- What is Kelvin's relationship to the DHARMA Initiative?
- Did Kelvin help create the map Locke found on the Blast Door of the Hatch?
- Did Kelvin die? Was he kidnapped by the Others? Is he even on the island?
The Island
The Swan Station (Hatch)
- Why is there a Quarantine sign on the door?
- What is the purpose of the number input?
- What happens if the numbers are not inputted in time?
- What do the hieroglyphics from One of Them mean?
- What was the “charging up” noise we heard when the clock switched to hieroglyphics in One of Them?
- What are the blast doors for?
- What is behind the cement wall?
- What is the magnetic force coming from?
- Who drew the mural? Was it Thomas?
The Pearl Station (Hatch)
- Does this station connect to the others simply by surveillance or are there secret passages?
- Where is the Pala Ferry/Barracks located as referred to in the Pearl Orientation Video?
- Where does the information sent via the pneumatic tube go?
- Do the screens monitor all the stations, or just multiple cameras in stations 3?
- Why is there a camera inside the station, who's watching it and where from?
- If there are five other stations, why are there nine monitor screens?
The Arrow Station
- What is this stations purpose?
- Why was this station abandoned?
- Is this one of the six DHARMA stations referred to in the orientation film?
- Why is there a Quarantine sign on the door?
The Medical Station
- Why is there a Medical Station on the Island? Was it there specifically for Claire?
- Why did the others abandon this station after Claire's escape?
- Is this one of the six DHARMA stations referred to in the orientation film?
- Why was there no Quarantine sign on the door?
- Why is there an Escape Hatch in this station? Why was the sign painted over?
The Monster
- What is the monster?
- Did someone create the monster? Who?
- Are the smoke and machine one being? Or is there more than one monster?
Other
- What caused the plane to crash?
- Why are there polar bears on the island? (DHARMA/Hanso experiment)
- What does the power line that Sayid finds in Solitary lead to? Where does it come from?
- Who are the dead bodies referred to by Locke as Adam and Eve?
- How did the Black Rock end up so far inland?
- Is the Black Rock a slave-transport ship? Or were the skeletons the remains of the losing side in a mutinty/attempted mutiny?
- Were there any survivors of the shipwreck of the Black Rock? If so, what happened to them?
- Because it has often contradicted revelations & developments in Lost, how is the Diary indended to relate to the show?
- What/Where is the Radio Tower?
- What is the sickness?
- If Richard Malkin was telling Mr. Eko the truth about being a fraud, why did he put Claire through all that hassle? If he was a fraud, why did he refuse to take Claire's money and even buy her airline ticket?
- Was Claire the client he was defrauding, or was she merely a stepping stone so he could defraud some couple in Los Angeles by getting a baby to them?
Miscellaneous
The Dharma Initiative
- We know DHARMA is an acronym. What does it stand for?
- Why does DHARMA supply food with its own logo on it? Do they manufacture their own supplies? What's wrong with sending regular brands of food? Why not just send Mallomars, for example, instead of Dharmalars?
The Hanso Foundation
- Is Alvar Hanso still alive? Is he on the Island?
- Are the others employees of the Hanso Foundation?
- What if any, is the relationship between Alvar and Magnus Hanso?
Widmore Construction/Labs
- Are Widmore Construction and Widmore Labs associated with the Hanso Foundation and/or the Dharma Initiative?
- Whose pregnancy test did Sun use?
The Numbers
- What do the numbers stand for?