The pack leader's wife, and two other werewolves, and reveal themselves to be plotting to bring about Ragnarok and rule over mankind and are going to murder Garth and Bess and frame Sam and Dean to galvanize the pack into joining them instead of their peace-loving ways.
Garth drunk after one beer.
After the Winchesters are captured to be pitted against the massive , Garth shows up to rescue them, explaining that he got worried when they didn't answer his phone calls.
Investigating the name, they discover it is an old girlfriend of the dead husband, but before they can go interrogate her, her son Scott killed someone and wrote the name Sussex on the wall in his blood leaving behind green goo as well.