Did Rose have a daughter who died, as stated in a deleted scene on the Season 1 DVDs? Or is this not canon?
Why did Rose seem to know that Bernard was alive? Was she in denial, or did she somehow know? Template:Crossref
Is Rose's (presumed) cancer in remission? If so, why? Template:Crossref
Is it significant that Bernard is the only surviving Tailie who has not been captured by the Others? Is this because he was really seated in the middle section next to rose?
What happened to Sayid during the seven years he traveled around, searching for Nadia?
If the government officials told Sayid that Nadia was alive before he boarded Flight 815, why did he then tell Danielle Rousseau that Nadia was dead? Template:CrossrefTemplate:Crossref
Why didn't Sayid learn any French while he was working in Paris, unlike Shannon? Why did he never mention having been to France? Template:Crossref
What is the "Basra Incident" referred to by Juliet? Template:Crossref
What is Sayid digging a hole for? Template:Crossref
Why did the Others take Alex away from Danielle? Was Alex abducted before or after the Purge?
How did Alex come to be "adopted" by Ben? Why was she told that he is her father?
Why do the Others call Alex by the name her mother gave her? Why didn't they rename Alex to make it harder for Danielle to find her?
Why does Alex disagree with what the Others are doing? Why is she different from the Others if she's been raised by them her entire life? Template:Crossref
How did Alex's relationship with Karl from? Who are Karl's parents, and where is he from?
Why hasn't Alex explained more about the history and intentions of the Others in all her contacts with the Losties?
Who did Alex think her mother was? How did she think she had died? What did Ben actually tell her about her parentage before she met Danielle? Template:CrossrefTemplate:Crossref
How was Alex aware that Ben might not be her father? Template:Crossref
Why did Ben see his mother twice? Template:Crossref
Why was Ben not given a better job than workman by the DHARMA Initiative? Template:Crossref
How did Ben become the leader of the Others? Template:Crossref
Why does Ben seem relatively calm when Oceanic 815 crashes, and the discharge occurs? Template:CrossrefTemplate:Crossref
If Ben wanted to capture Jack, Kate, and Sawyer, why did Tom not do so during their first encounter? Template:CrossrefTemplate:Crossref
Did Ben kill or order the death of the real Henry Gale? Template:Crossref
How did Ben get caught in one of Danielle's traps? What was he doing alone in the jungle? If he wanted to infiltrate the Losties' camp, why didn't he send someone else?
Why didn't Ben escape the Losties when he had the chance, during the lockdown? Template:Crossref
Why did Ben tell Locke that nothing would happen if he did not push the button? Was he unaware of the consequences, or did he want the System Failure to happen? Template:Crossref
What is the ash-like substance around Jacob's cabin? Template:Crossref
What is the significance of the dog painting and the jars of liquid in Jacob's cabin? Template:Crossref
What is Jacob? Why can't he be seen? Template:Crossref
Why did Jacob make a list? If Jack wasn't on it, who was? Template:Crossref
How does Jacob cure cancer? Why doesn't he cure Ben's cancer?
Why is Ben the only one who can see Jacob? Template:Crossref
Did the Others have any contact with Jacob before Ben joined them? If so, who was their contact? Template:Crossref
Why do the Others have such faith in him as their leader when they have not even seen him? How do they know that he is a "great man" or a "magnificent man", just from Ben's reports? Template:Crossref
Why does Jacob seem to be wearing old-fashioned clothing? Template:Crossref
Why is Jacob averse to technology? Why did he react as he did to Locke's flashlight? Template:Crossref
Why did Jacob say "Help me" to Locke? Why didn't Ben hear it? Why couldn't Locke hear anything Jacob said to Ben? How does Jacob communicate? Template:Crossref
How does Jacob move objects? How did the lantern fire go out? Template:Crossref
What is the circular pattern on Jacob's chair? Template:Crossref
How does Jacob "summon" Ben? Template:Crossref
Why does Jacob's cabin appear to Hurley, and seem to shift around? Template:CrossrefTemplate:Crossref
如對以下的未解決謎題有任何推論,請到理論頁面去討論, Claire Littleton/Theories, Richard Malkin/Theories
Was Richard Malkin telling Mr. Eko the truth about being a fraud? If so, why did he refuse to take Claire's money, and even give her $6000 and a free airline ticket? Template:CrossrefTemplate:Crossref
Why did the Others want Aaron? Template:CrossrefTemplate:Crossref
Why have the Others seemingly stopped trying to get Aaron since his birth?
Why did Claire decide to name him Aaron?
Why was it so urgent that Aaron be baptized? What did Charlie's dreams mean? Template:Crossref
Does Danielle know more about the Island than she has shared? If so, why does she withhold so much from the Losties? If not, why has she learned so little over the last 16 years?
Where is the ship Danielle and her expedition came on?
Did Danielle's expedition arrive on the Island before or after the Purge?
Why was Danielle on a scientific expedition while 7 months pregnant?
Why is Danielle's clothing and equipment primarily military in nature if her "routine expedition" was scientific/medical?
What happened to Danielle at the radio tower and at the Black Rock? Why did she claim that the Others controlled the radio tower if it was abandoned?
Why was Danielle forced to kill her crew? Did they really get "the sickness"? If so, why did Danielle not get sick?
Was Danielle lying about the Others creating a pillar of smoke when they took Alex? Template:Crossref
Who lit the brazier? If it was Danielle, how did she do it while on the other side of the Island, and why did Sayid see no footprints in the sand around it? If it was the Others, what was the smoke's purpose? Template:Crossref
Why does Danielle claim to have seen no other living person in 16 years? Why have the Others left her in isolation for so long?
What does the triangle on Danielle's map point to?
What power source does Danielle use to recharge the batteries? Template:Crossref
Where has Danielle lived since her quarters exploded? Template:Crossref
How does Danielle know that the Monster is a "security system"? Where did she get that idea from? Template:Crossref
Was Danielle originally part of the DHARMA and was she sent to spy on them?
If she was part of the DHARMA, did she and Ben go out?
What happened to Desmond's father that forced Desmond to leave University before graduation to take care of his brothers? Template:Crossref
What order did Desmond not follow that led to his dismissal in the army? Template:Crossref
When Jack and Locke questioned the value of pushing the button, why didn't Desmond tell them about the System Failure he witnessed when the countdown timer reached zero? Template:Crossref
In "", why didn't Desmond take the book "Our Mutual Friend" with him when he fled?
Why didn't Desmond tell anyone about the fail-safe key, particularly in ""?
Is there a special meaning or significance to Desmond saying "See you in another life"?
What happened to Desmond during the discharge? Why was he naked but uninjured? Template:Crossref
What is the nature of Desmond's flashes?
Why was Penelope Widmore looking for an electromagnetic anomaly? How does she seem to know that Desmond is alive and well somewhere in the Pacific? Template:CrossrefTemplate:Crossref
Why does the information sent via the pneumatic tube just end up in a pile in a meadow? Template:Crossref
Why is there a camera inside the station, who is watching it and where from?
If one of the hatches is a ruse, is it the Swan or the Pearl (or both)? Could it have been the Swan before its purpose changed to entering the numbers?
Who salted the earth, and was it their intention to make a question-mark shape?
What Others, besides Tom, Ben, and Juliet, have gone into it to view the survivors? Template:Crossref
Why is there a Quarantine sign on the door? Template:Crossref
Who is the (former) owner of the glass eye found here? Template:Crossref
Is it just a substation or supply base (only the part the tailies found?)
Who hid the Orientation video splice in the bible? Template:Crossref
If it was a simple supply station, why was Horace, with the designation "mathematician" in the DHARMA Initiative, shown numerous times (across decades in the timeline) wearing an Arrow jumpsuit?
Why was this station built on another island? Was it simply to keep employees safe and physically distanced from the dangerous species being researched there? Template:Crossref
Why were the Others building a runway there (as stated by Juliet)? Template:Crossref
Did someone create the the Monster, and if so who?
Is there more than one Monster (as seen in "", three separate puffs of black smoke connected together)?
Is it controlled by someone or a free creature on the Island (if it is a creature, that is)?
Why did it kill the pilot? Template:Crossref
Why did it wait until meeting Eko for a second time to kill him? Template:Crossref
How and why does it uproot trees? Template:CrossrefTemplate:Crossref
Is there a connection between the disappearance of Yemi's and Christian Shephard's bodies, their subsequent appearances on the Island, and the "Monster" (a connection alluded to by the writers themselves)? Template:CrossrefTemplate:Crossref
Why did Locke see the "Monster" as a white light but Eko saw it as black smoke?
Is there a connection between the chittering noise heard before Nikki is bitten by a Medusa spider, and the appearance of the spiders? Template:Crossref
How is the Monster a "security system"?
Why did the DHARMA Initative or Kelvin and Radzinsky call the Monster "Cerberus"?
Can the "Monster" take human form?
If the "Monster" can take human form is that why when Shannon saw Walt she ran into Ana and died? When Eko saw Yemi he ran to find him and then he died? When Jack saw Christain and chased after him, he nearly fell off the cliff?
Island Inhabitants
Who are the dead bodies referred to by Locke as Adam and Eve? Template:Crossref
How did the Black Rock end up so far inland? Template:Crossref
Were there any survivors of the shipwreck of the Black Rock? If so, what happened to them?
How did the Nigerian plane crash on an island in the Pacific when it set off from Africa and was too small to fly very far? When did this happen?
What culture and civilization does the four toed statue and stone wall artifact represent? What do the Others seem to know about them?
Island Phenomenon
What are the whispers?
Why was "Template:Link" whispered in the episode "" right before Sawyer got shot with a dart?
Why do the monsoon rains seem to preclude particularly terrifying events?
What caused the sudden rising tide in the episode ""? Sayid said "this can't be normal, the tide shifting so suddenly, rising in so short of time."
When Charlie and Sayid finally found the fire that caused the pillar of black smoke in the Season 1 finale, Sayid makes the comment "there are no footprints" (around the fire). Why are there no footprints? How was the fire started? Who started the fire? Template:Crossref
If Michael and Walt were able to leave the island via The Others' Boat, then why couldn't Desmond live the Island on the sailboat. Why, if he went West, did it circulate back toward land? Why did Juliet say in "", upon hearing that the survivors had a sailboat, that they can "have fun going round in circles"? In addition to this, why is the large trawler used for transport between Hydra island and the mainland unable to leave the island? (Ben described the submarine as the only way to leave)
Is the "Electromagnetic Anomaly" caused naturally by the island or simply just the failed Swan Station experiments?
Miscellaneous[]
Miscellaneous Topic
Questions
Biological
How were the Flight 815 survivors able to survive the crash with only minor injuries? Template:Crossref
What is the sickness?
What does the medicine do?
Psychological
Are the Losties really having visions and hallucinations; if they are, why?
While Jack and Kate were out looking for Claire and Charlie after their kidnapping, and Jack and Ethan got into a fight, why did Kate seem to think that Jack had just "hit his head"? How did she not see or hear the fight at all? Template:Crossref
Physical
Why does the power line that Sayid finds in "", that leads to the Looking Glass, go into the ground?
Why does DHARMA supply food with its own logo on it? Do they manufacture their own supplies? What is wrong with sending regular brands of food? Why not just send Mallomars, for example, instead of Dharmalars? Template:Crossref
If they are the same person, why does he have a prosthetic hand in one of the Orientation films (though admittedly this is filmed years after the others seen, and possibly after "the incident)?
Was its funding really cut in 1987, as Hugh McIntyre claimed in his interview with Jimmy Kimmel as part of the Lost Experience?
If cancelled, why do the supply drops continue?
What exactly is the DharmaTel network referenced on the blast door map? Is it still working?
Why did the Hanso Foundation cut the DHARMA Initiative's funding in 1987 (as stated in the Lost Experience)? Why does Thomas Mittelwerk call the project a failure in 2006?
What significance is the Foundation's strong ties to both the Widmore Corporation and Paik Heavy Industries?
Why do bad things happen to the people involved with the Numbers?
What makes each number in the sequence so special?
What do the numbers as "core values" of the Valenzetti equation actually correspond to, in terms of human and environmental factors as stated by Alvar Hanso? (I.e., does "4" stand for famine while "8" stands for disease, etc.?)
Why was it apparently around when Rousseau was on the Island in 1988, but no longer an issue now?
How did DHARMA create a vaccine against it?
What relation is there between the sickness and the QUARANTINE signs on some DHARMA hatches?
How was the sickness so terrible that it caused Rousseau to kill her team to prevent it from spreading and potentially reaching the outside world?
Infrastructure[]
There are many things about the Island that seem to be assumed and have not been investigated:
Electricity: Where does the power in the various DHARMA Stations come from?
Water: In the Swan, the Staff, The Hydra and (at least) The Flame there is running water. Where is the catch tank or well, pumps, purification, and so on?
Waste: Where do things that get flushed go?
Communications: What exactly isDharmaTel? Where do the Video surveillance cables go? How extensive is the PA speaker system on Hydra Island? What about the inter-computer links?
Expanded universe[]
Waving figure on the Season 2 DVD Lost Connections[]