Supernatural Season 3 Episode 7
"Fresh Blood"
Sam and Dean capture a female vampire named Lucy who claims to have no knowledge of how she became a vampire, the brothers have nothing else to do but to end the life of the poor victim. The guys discover Dixon, a male vampire, is giving out human blood to unsuspecting females in bars, offering it up as the "latest drug" and turning them all into vampires.
Meanwhile, Gordon escapes from jail and goes after Sam. However, Dixon intercepts Gordon and turns him into a vampire, which makes Gordon more powerful than before and a much bigger threat to Sam. When he visits his partner, he ends up killing him because his partner wants him dead because Gordon now is dangerous to the society. Gordon lured the brothers in a vacant house and trapped Sam inside and Dean left outside, but the brothers still killed Gordon even with his super-strength.
