The castaways on the raft are surprised at sea by something they didn't expect. Meanwhile, remaining islanders try to blow open the hatch. A visitor to the encampment might be a threat to Claire's infant son.
An elderly woman crashes her car into a crowded restaurant. One of the patrons is Sara's paramedic boyfriend. Grissom and Nick investigate the possible carbon monoxide murder of a woman in her home. (TV-PG)
