Smallville :

While his father is awaiting surgery, Clark befriends a young boy, Garrett whose brother Vince dies from liver failure. However, everyone is shocked when Vince shows up at the hospital, alive and seemingly well until his liver starts failing again.

In a desperate attempt to keep his brother alive, Garrett straps a meteor-rock bomb to himself and demands that Vince be given Jonathan's liver. Clark learns that Lionel has been using a sample of his blood to bring the dead back to life.