The castaways on the raft are surprised at sea by something unexpected.

Meanwhile, remaining islanders attempt to blow open the hatch, and a visitor to the encampment might be a threat to Claire's infant son. 

original airdate--May 25, 2005           rating--20.71 million

songs--"Main Title" (Composed by J.J. Abrams)

1. "Parting Words" by Michael Giacchino
2. "Oceanic 815"by Michael Giacchino

Flashback--Jin-Soo Kwon, Charlie Pace, Michael Dawson, Hugo "Hurley" Reyes and John Locke