Smallville (2001)

S3E15 Resurrection

As Clark waits for his father's surgery, he forms a bond with Garrett, a young boy grieving the loss of his brother Vince to liver failure. The situation takes a startling turn when Vince unexpectedly reappears, seemingly recovered, but soon suffers a relapse. In a frantic effort to save his brother, Garrett attaches a Kryptonite bomb to himself and threatens to detonate it unless Jonathan's liver is provided to Vince, putting everyone in the hospital at risk.