Okay, first of all, can we all please just take a moment to appreciate the attractiveness of the two Winchester brothers? Because I'm in love with both of them. Dean, the ever sarcastic and cocky brother, won my heart from the beginning. Sam is deeper but just as swoon-worthy.
"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." (taken from imdb.com)
While the series may get pretty dark, there are always moments of comical relief, mostly due to Dean. I'd definitely recommend this series to anyone who (a) appreciates a show with two extremely attractive brothers and (b) loves a a bit of a thriller.