SUPERNATURAL Season 1 Episode 12 : Faith

When Dean is accidentally electrocuted fighting a monster, he permanently damages his heart. When he's diagnosed as only having a month, at most, to live, Sam searches for a means to save him and finds Roy Le Grange, a faith healer who may actually be the real deal. After Le Grange heals Dean, the brothers discover that Le Grange is using black magic to bind a "Reaper" to do his bidding...and each healing comes with a terrible price.