The fourth season of the American serial drama television series Lost commenced airing on the ABC network in the United States, and on CTV in Canada on January 31, 2008, and concluded on May 29, 2008. The season continues the stories of a group of over 40 people who have been stranded on a remote island in the South Pacific, after their airplane crashed there more than 90 days prior to the beginning of the season. According to Lost's executive producers/writers/showrunners Damon Lindelof and Carlton Cuse, there are two main themes in the fourth season: "the castaways' relationship to the freighter folk" and "who gets off the island and the fact that they need to get back".

Damon Laurence Lindelof is an American screenwriter, comic book writer, and producer. Among his accolades, he received three Primetime Emmy Awards, from twelve nominations. In 2010, Time magazine named him one of the 100 most influential people in the world.