Supernatural 101 I put this together several months ago for a friend I was trying to convert to the show. This weekend I decided to code it for online reference. If you notice errors please let me know.

Supernatural is a show introduced on the WB (now the CW) in the fall of 2005. The creator of the show, Eric Kripke, envisioned a show that showcased American Urban Legends and Myths. The show chronicles the story of the brothers Sam & Dean Winchester. The show is in it’s third season as of January 2008.
Dean & Sam travel across the country in a 1967 classic Chevy Impala searching for their father, John Winchester, the supernatural, and the thing that killed their mother, Mary Winchester.
This show appeals on so many levels--it is a one-hour thriller movie per episode with all the creepiness and yes some of the gore of the genre. It follows a five-year myth-arc that is intricately woven through almost every episode. Sometimes so subtlely that you won't even see it until later shows review secrets and you find as you re-watch previous episodes there were clues just "laying around" in plain view.
It is a show that also doesn't take itself too seriously. It pokes humor at itself, at the genre, at it's fans (which the fans love), and at the characters themselves.
But *more* than anything it is a show about family, about love, and about devotion and sacrifice. You will come to love the brothers Winchester. I don't love or even much like modern-day horror shows--too much blood and gore. But this show--I love.
If anyone is an X-Files fan--you'll find similarities. The show has some X-Files alumnae as writers/directors. And for those of you who are Buffy or Whedon fans, you'll find a clone of Joss in Supernatural's creator, Eric Kripke, who is dearly loved by the fans.
Please note that I link to various fanvids throughout this post. I try to note when those vids may be spoilery for certain episodes/seasons. But I may have missed something.
Below the cut is a longish introduction to this show. If you find yourself interested, be sure to watch Supernatural on The CW, Thursdays at 9pm. If you start with S1 DVDs, give yourself until after the first episode of S2 before you pass full judgement on the show. Many folks find that by mid-season 1 they are intrigued or hooked--but almost all who make it to the premier episode of season 2 are full-on addicted.
Wow if you lasted through all that--you're definitely either a Supernatural fan already or you are a prime candidate. Go watch some--Thursdays, 9pm on the CW.