Matthew fox ... Jack Shepard, an American who may be a doctor.
American, doctor (came to Australia to find his father and bring his body back to the United States)
Evangeline lilly ... plays the fugitive Kate.
Canadian, fugitive (escaped in Australia and returned to the United States after being arrested)
Dominic monaghan ... Charlie, the bassist of the British band Drive Shaft.
British, bass player (came to find a former band member to regroup the band, I don't know why I took this plane)
Emilie de Ravin ... Claire, a pregnant Australian.
Australian, pregnant before marriage (send the baby to the United States to raise)
Maggie grace ... as an American, Shannon.
American, studying in Australia, doing nothing (brought back to America by his brother Boone)
Ian Joseph Somerhalder ... as Boone Shannon's brother.
American, the owner of a wedding company (having an affair with his sister, coming to Australia to bring his non-sister Shannon home, and the first season ended)
Little Perinaud. ... Michael is the owner of a construction company
Seems to have had artistic ambitions.
Black American, owner of a construction company (came to Australia to take Walt, the child born with his ex-girlfriend, back to the United States)
Malcolm david kelley ... as Walter, Michael's son.
American, living in Australia with his mother (mother died and was taken back to the United States by his biological father)
Jorge garcia ... plays Hurley.
American, unemployed, shareholder of box company (won the lottery, came to Australia to find the secret of the winning number, and returned to the United States)
Josh holloway ... "Sawyer" (real name unknown), an American liar.
Americans, liars (come to Australia to avenge those who cheat their mothers and lead to the destruction of their families. As a result, someone used it and killed the wrong person. Sent back to the United States for fighting in a bar) (The 23rd episode mentions Sawyer's real name "james ford").
Daniel Dae Kim ... Kim, a Korean who may have organized crime.
Korean, Sun's husband, works in his father-in-law's company (sent to Australia to take the Rolex watch to a friend of his father-in-law's in America).
Jin Yunzhen ... as Kim's wife and grandson.
Korean, the daughter of the boss of a big Korean company (I wanted to leave her husband Kim at the airport)
Naveen andrews ... As a veteran of the Iraqi Republican Guard, Sayid received training in communication technology.
Iraqis, * * * and National Guard officers (cooperate with American intelligence agencies to crack down on terrorist organizations in order to find their loved ones, and return to the United States to find their loved ones after completing their tasks)
Terry O'Quinn ... John Locke, a paraplegic who is interested in survival.
American, outdoor survival enthusiast, employee of box company (came to Australia to participate in outdoor survival tourism project, but was rejected because of his lame leg and wanted to go back to the United States)