Frank J. Lapidus

Frank J. Lapidus is a pilot who was hired on a mission to the island where Oceanic Flight 815 crashed. He helped the survivors of the crash against mercenary Martin Keamy and helped to rescue a group who became known as the Oceanic Six. Three years later, Frank encountered the group again while working as a commercial airline pilot. His plane landed back on the island, and he was forcibly taken in by a group of his passengers headed by Ilana and Bram, who were working for the island's highest authority figure Jacob. In the series finale, he ultimately escaped the island with a few of his fellow inhabitants.