find 815 is the second alternate reality game (arg) for the american broadcasting company's serial drama television series "lost". it began on december 28, 2007 and concluded on january 31, 2008 with the premiere of the fourth season of "lost". the free registration arg follows oceanic airlines it technician sam thomas as he investigates the whereabouts of oceanic flight 815, on which his girlfriend sonya was a flight attendant. of the 324 people on board the flight, seventy-one survived and they serve as the characters of "lost". "lost" previously hosted an arg during the hiatus between the second and third seasons called the "lost experience". find 815 was produced by digital entertainment company hoodlum and abc.