Supernatural - The Magnificent Seven Season 3 Episode 1

When the gates to Hell open, seven of the demons take up shop in Lincoln, Nebraska, and start a string of bizarre killings. Two hunters, Tamara and Isaac, help Sam and Dean take care of the demons, but soon find they're being hunted as well. A mysterious blonde woman with a mystic knife also comes to their aid, but it's not clear who she's working for.