L. Scott Caldwell and Sam Anderson deliberately did not meet until they filmed their touching reunion scene.
Locke's crossword clue 'Enkidu's friend' and answer 'Gilgamesh' foreshadows the future relationship between him and Mr. Eko.
This is the first episode in which the flashbacks are not related to any of the original 14 characters.
Ana Lucia is informed that the criminal who confessed to killing her was picked up in "Echo" park, alluding to her friendship with Mr. Eko.