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For remaining unanswered questions from the Lost Experience, see here

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This is a list of all the unanswered questions that have been asked in Lost, both explicitly and implicitly. Once a question has been officially answered on the TV show or by some other source, it will be removed from the list.

This list is organized by episode, in the order that each mystery is first introduced. For a list of unanswered questions by topic, see Unanswered questions. For a list of the mysteries on the show, see Mysteries.

Note that these questions should be directly tied to the narrative of the show, and specific mythological unanswered mysteries.

Season 1

Episode	Questions	Theories
1x01 "Pilot, Part 1"	How did Jack end up in the jungle, so far away from the crash site? Why did the plane lose all radio contact long before the actual crash?	The Crash
1x04 "Walkabout"	Why did Locke temporarily lose the feeling in his legs while hunting the boar?	John Locke Healing properties The Monster
1x05 "White Rabbit"	Where is Christian's body?	Christian Shephard
1x10 "Raised by Another"	Why did Richard Malkin insist that Claire must raise her child by herself but then change his mind? Why did Malkin insist that Claire fly on Oceanic Flight 815?	Claire Littleton Richard Malkin Aaron Littleton
1x14 "Special"	How is Walt special?	Walt Lloyd
1x16 "Outlaws"	What was the Tampa Job?	Tampa Job
1x22 "Born to Run"	Who sent Kate the letter telling her about her mother being treated for cancer in hospital? How does Walt know about the hatch Locke is trying to open? Why does he warn him not to do it?	Kate Austen Walt Lloyd
1x24 "Exodus, Part 2"	Why did the Monster become aggressive toward Locke instead of letting him go like last time? Where was the Monster taking Locke?	The Monster John Locke

Season 2

Episode

Questions

Theories

2x07
"The Other 48 Days"

Whose glass eye does Libby find in the Arrow station?

Glass eye

2x09
"What Kate Did"

What is the nature of Kate's horse?
Why was part of the orientation film cut out and hidden in the Bible in the Arrow station?

Kate's horse

2x23
"Live Together, Die Alone, Part 1"

Why was Desmond dishonorably discharged from the British Army Royal Scots regiment?

Desmond Hume

Season 3

Episode	Questions	Theories
3x03 "Further Instructions"	Who are the skeletons in the Polar Bear Cave? How did Locke and Eko escape the Hatch implosion?	Polar bear cave Discharge John Locke
3x05 "The Cost of Living"	What did Eko mean when he said "You're next"?	The Monster Eko
3x16 "One of Us"	Did Jacob really cure Rachel's cancer or did Rachel's cancer never come back in the first place?	Jacob Mikhail Bakunin
3x17 "Catch-22"	How did Naomi get a copy of the photograph and why was she carrying it? What is Brother Campbell's relationship to Ms. Hawking?	Naomi Dorrit Brother Campbell Ms. Hawking
3x18 "D.O.C."	Why is the room in the Staff hidden?	The Staff Mr. Paik Hanso Foundation
3x20 "The Man Behind the Curtain"	What was the shaking during the incursion by the hostiles when Ben was in class?	The Hostiles/Others
3x22 "Through the Looking Glass, Part 1"	Who is the musician that programmed the jammer?	The Temple The Looking Glass

Season 4

Episode	Questions
4x01 "The Beginning of the End"	How is the cabin able to move?	The Cabin
4x02 "Confirmed Dead"	When and where was the photo of Ben taken?	Benjamin Linus
4x03 "The Economist"	Who is the R.G. on Naomi's bracelet? Why is Jacob's cabin not where Locke expects it to be?	Identity R.G. Sayid Jarrah Elsa's employer The Island
4x06 "The Other Woman"	How does Harper suddenly appear and disappear into the jungle? What does Penny know about her father's research? Who is the man being beaten by Widmore? Who shot the video? How is Harper in contact with Ben? Who made Daniel's map?	Harper Stanhope Charles Widmore Kahana The Tempest
4x07 "Ji Yeon"		Ray Captain Gault
4x09 "The Shape of Things to Come"	The Future Why can't Ben kill Widmore?	Benjamin Linus Charles Widmore
4x11 "Cabin Fever"	The Past How did Richard get to the mainland? What happened during Abaddon's walkabout?	Richard Alpert John Locke Richard's items Matthew Abaddon Jacob
4x12 "There's No Place Like Home, Part 1"		Daniel Faraday Sun-Hwa Kwon
4x13 "There's No Place Like Home, Part 2"	Why does the Orchid tape begin to rewind itself?	The Island Miles Straume Charlotte Lewis Frozen wheel The Orchid John Locke

Season 5

Episode	Questions
5x03 "Jughead"	How did the U.S. Army find the Island? Who else visited Daniel Faraday's office before Desmond?	U.S. Army
5x04 "The Little Prince"	Who ransacked the beach camp?	Tony
5x06 "316"	How did the U.S. Army Island photo come to be posted at the Lamp Post? Who is the man who predicted the Island's movements?	The Lamp Post Eloise Hawking
5x07 "The Life and Death of Jeremy Bentham"	How did Rousseau's and Daniel's maps of the Island end up at the Hydra station? Who wrote the hieroglyphs on Daniel's map and why?	The war
5x08 "LaFleur"	Why do the Others want Paul's corpse?	The Truce Paul
5x09 "Namaste"	Why are the Numbers heard in the cockpit?	Numbers during crash Sun
5x12 "Dead Is Dead"	Where did Locke go when he left the Barracks? What is the significance of the carving beneath the Temple?
5x13 "Some Like It Hoth"	Why did Chang want Alvarez' corpse brought to the Orchid?	Alavarez Felix
5x14 "The Variable"	What is the nature of the falling-out between Eloise Hawking and Charles Widmore?	Eloise Hawking
5x16 "The Incident, Part 1"	Who broke the circle of ash around the cabin and when did it happen? Why and when did Jacob leave the cabin? Why did Ilana order the cabin to be burned?	The Incident

Wikia

Unanswered questions by episode

Contents

Season 1

Season 2

Season 3

Season 4

Season 5

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