Jack Shepard was a passenger on Oceanic Flight 815 travelling from Sydney, Australia to Los Angeles USA, which crash landed on a small island somewhere in the Pacific Ocean in May 2008. The Lost Island, as it was eventually dubbed by the survivors, was the final destination of Flight 815, and the final resting place for some of its ill-fated passengers. After the crash Jack Shepard helped organise the survivors and administer medical aid. The Lost Island's leadership position was quickly filled by Jack Shepard after the other crash survivors looked to him for guidance and direction after his heroics in rescuing crash survivors.