Supernatural (2005 - )

Two brothers follow their father's footsteps as "hunters" fighting evil supernatural beings of many kinds including monsters, demons, and gods that roam the earth.

links: IMDb, Rotten Tomatoes

seasons: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15