Were there other members of the DHARMA Initiative that participated in the Purge?
How were all of the DHARMA members killed so rapidly?
Who chose Ben's birthday as the day to kill everyone from the DHARMA initiative?
Why was the mass grave still open?
Were children spared/taken during the gas attack?
Why did the Hostiles wait so long to initiate the Purge?
Who decided to intitiate the Purge?
Hostiles:
Who are/were the hostiles and where did they come from?
Did Alvar Hanso know the Island was already inhabited when he sent the DHARMA Initiative to work there?
Where did the gas and gas masks come from?
Do the Hostiles have ties to the outside world prior to the Purge?
Are the Hostiles really the 'original inhabitants' of the island?
What started the conflict between DHARMA and the original inhabitants?
How are the hostiles and the many companies around the Hanso Foundation related, considering both parties have strong, obvious interests in scientifical experiments being conducted on the Island?
Jacob:
Why did Ben seem so angry when Locke told him what Jacob had said?
Who or what is Jacob?
Why was there a painting of a dog in Jacob's cabin?
What is the liquid substance contained in the jars in Jacob's house?
Why are there scratches on Jacob's chair?
Why couldn't Ben hear what Jacob said to Locke?
Why does technology appear to enrage Jacob?
What happened to the fire inside Jacob's house?
How did the lantern become unbroken?
How does Jacob contact/summon Ben?
Ben:
Why didn't Ben hear what Jacob said to Locke?
Why was Ben so angry when he heard about Naomi, the ship offshore, and the satellite phone?
What was Ben's dead mother doing on the Island?
Did Ben volunteer to kill his father?
At what point did Ben become the de facto leader of the Others/"hostiles"?
Why did Ben get so upset upon Locke hearing Jacob's words, to the point of shooting him?
And why didn't Ben finish Locke off?
Was it personally about Locke or would Ben be as upset if anyone else heard Jacob's words?
Was Ben actually able to talk to Jacob?
Was Ben alarmed to learn that Jacob said "help me" to Locke?
Was Horace's motivation in giving Roger a job to bring Ben to the island?
Why do Ben and Locke's mothers both have the same first name, Emily?
Who exactly was Annie and what happened to her between Ben's childhood flashback and the moment of the purge?
Is Ben really Alex's father and if so how can Danielle Rousseau be Alex's mother (as previously thought) when all mothers who conceive on the island die in labor.
Richard:
Why does he not personally know Jacob or where he is?
Is he the same person that appeared to young Ben in the jungle?
If it is him, why does he not appear to age?
How did Richard come to be on the Island?
What was his position in the hierarchy of the Hostiles prior to Bens rise?
What it his position among the Others?
Pregnancy:
Is it coincidence that Ben's mother both delivered prematurely and died in childbirth, and that condition seems to afflict other pregnant women on the Island?
Did Emily actually die in childbirth?
When did the pregnancy problems begin on the island?
DHARMA:
Why has DHARMA continued to make supply drops on the Island?
Why were the beers that Roger was delivering to the Pearl marked with the Swan logo?
Why does the science teacher tell the students that, once water is added to the bicarbonate, they will get the demonstration of a volcanic reaction, when the classic lesson actually involves vinegar (or some other acid), while water will just blend with the bicarbonate?
Mikhail
Why doesn't anyone seem shocked when Mikhail returns? Why is Ben actually irritated that he's alive?
Why doesn't anyone help when Locke is beating up Mikhail?
Was Mikhail on the Island at the time of the purge?
Why was the Sonic Barrier set at a lower level, allowing Mikhail to survive when thrown in the fence's range?
How did Mikhail know about the ship and its location? Naomi did not tell him about the ship, or the two facts (130 clicks and "west") that he knew.
Locke:
What was the trail of grainy substance that Locke stopped to investigate on the way to see Jacob?
ANSWER: This grey grainy substance is gunpowder. Jacob's hideout is encompassed by it, and it could be lite with a flame; either to scare-off intruders or perhaps to set-off some some of trap.
Will Locke survive?
Why did Alex give Locke the gun?
Why did Locke take out the knife at Ben while he had Alex's gun with him?
Is the gun Ben used to shoot Locke the one Alex had given Locke? If so, when and how did he get it?
Other Questions:
If all the Dharma initiative's members were killed during the purge using this gas, why would the skeleton have a hole in the head?
How did the van get from the mesa to where Hugo found it?
What were Roger and Emily doing in the woods on a hike when she was seven months pregnant? And how did they get there, if they had no means of transportation?
Did Horace just happen to be driving past when Roger emerged from the woods carrying Emily the day Ben was born, or was that a set up?
Where did Jack and Juliet go?
What happened to Cooper's body?