1.07 - Hook Man

Sam and Dean help a girl whose date became a victim of the "Hook Man," a famous urban legend that turns out to be real, in a small college town somewhere in Iowa. In order to save her and her father, the local minister, the brothers have to find the ghost's bones so they can destroy them. But Sam and Dean run into a problem when they discover that the bones are in an unmarked grave.

Source: IMdb