Do No Harm

Boone is dying. Internal bleeding. Jack does everything. Transfusion with Sun's blood. Makeshift surgery. He refuses to give up. But Boone tells him to stop. Let me go.

At the same moment, Claire goes into labor. Kate is alone with her. No doctor. No supplies. Kate panics. Claire pushes. The baby comes. Aaron is born under the stars.

Boone dies. Jack emerges from the cave. Exhausted. Defeated. Shannon collapses. Life and death, in the same instant. Jack can't save everyone. That night, he learns.