হারিয়ে গেছে | Season 4 | Episode 8 (Meet Kevin Johnson) 

After Sayid encounters Michael, the story of how Ben's spy got to the freighter is finally revealed. Back at Locke's camp, Ben sends his daughter, Alex, to a safer place so that she may survive an approaching attack.
মূলশব্দ: হারিয়ে গেছে, season 4, full episode