Episode 21 of "Supernatural"
s01e21 Salvation
Title: Salvation
Original Air Date: 04/27/2006
Plot Outline:
Sam has a vision of a family being attacked in the same manner as the attack on his mom, so he, Dean and John head off to Salvation, Iowa, to save this family and finally kill the demon using the Colt gun. However, Meg calls and lets the family know she is going to start killing their friends unless they return the gun. John meets Meg to deliver a fake gun, while the boys are left to deal with the demon.
