Season 1, Episode 1: Pilot Part 1

We'll begin at the beginning. Obviously, the first episode sets the scene, introduces several (but not all of) the major characters that will be important to the overarching storyline. Conflicts or challenges also begin to come into focus.

MAJOR PLOT POINTS

The episode opens with Jack unconscious in the jungle. When he comes to, he goes on a flurry saving fellow passengers in what we soon learn was a plane crash. Among those Jack saves are a pregnant Claire, Hurley and Rose.

The genesis of Jack's romance with Kate is introduced as he asks her to sew shut a gash on his side. We also learn that Jack's heroics are tied to his utmost failure when he severed the spinal sac of a 16-year-old during his first surgery. After that, he taught himself to let the fear in, but only for 5 seconds.

Jin and Sun are introduced with Jin being something of a controlling douche bag. He tells his wife at one point, amidst all the chaos, "Don't worry about the others. We need to stay together."

Among the other revelations, Kate didn't lose consciousness during the crash. She knew the tail section broke off. Later, as if to provide a small insight into Kate's world perhaps, we see her steal the shoes from a dead man.

The Smoke Monster terrorizes the survivors from the jungle, which complicates the search for the rest of the plane (and possibly other survivors). But a group ventures out during the daylight anyway.

Charlie, the world famous song writer and bass player for Drive Shaft, joins the search party, but only in an effort to recover the heroin he stashed in the plane's lavatory immediately before the crash. While at the plane, a nervous Charlie scores his smack, but the pilot — who turns out to be alive (aren't all the pilots in the show?) — is devoured by the Smoke Monster. Kate is forced, at that point, to let the fear in.

Walt's dog is omnipresent in the episode.

QUOTABLE
"Wasn't for me." — Jack upon revealing that he once took flying lessons