Season 5 was shown in the United States and Canada from January 21, 2009 to May 13, 2009. This season follows two time lines. The first takes place on the island where the remaining survivors time travel through many time periods. The second shows the Oceanic Six trying to return to the island. Later in the season, most of the characters end up on the island in the year 1977. They join up with the DHARMA Initiative, a group of scientists who lived on the island. Some characters return to the island in 2007, where they meet Jacob, the leader of the Others.