In the 2004 - 2010 TV series, "Lost," a diverse group of people must adapt to living on a lush, mysterious and isolated island. They are the final survivors of plane crash, Oceanic Flight 815. Michael Dawson is a member of the group.

After being on the island just over 2 months with his son Walt, Michael is able to return to New York City at the end of Season 2. He was able to leave the Island on a motor boat. Later racked with guilt, he becomes estranged from Walt and turns suicidal. In order to redeem himself Michael goes undercover for Ben (Benjamin Linus an eloquent antagonist in the series and a long-time resident of the Island who is the leader of the Others).

Michael becomes a saboteur on the freighter Kahana, posing as a deckhand named Kevin Johnson. He is aboard the freighter when the C-4 bomb is found. He stops its battery with liquid nitrogen to delay its detonation. This act allows the Oceanic Six to escape, but the bomb eventually explodes, destroying the freighter and killing Michael.

More Info: lost.wikia.com