High Quality Content by WIKIPEDIA articles! Frank J. Lapidus is a fictional character on the ABC television series Lost played by Jeff Fahey. Frank is introduced in the second episode of season four as a pilot hired on a mission to the island where Oceanic Flight 815 crashed. He aids the survivors of the crash against mercenary Martin Keamy (Kevin Durand) and helps to rescue a group who become known as the Oceanic Six. Three years later, Frank encounters the group again while working as a commercial airline pilot. His plane lands back on the island, and he is forcibly taken in by a group of his passengers headed by Ilana (Zuleikha Robinson) and Bram (Brad William Henke), who are working for the island`s highest authority figure Jacob (Mark Pellegrino).