The season begins with brothers Sam (Jared Padalecki) and Dean Winchester (Jensen Ackles) bracing themselves for the possibility of an apocalyptic war. They realize that hunting down the hundreds of spirits that escaped from the Devil's Gate—a doorway to Hell briefly opened at the end of the previous season—will be an enormous task. With only a year left to live—he made a demonic pact to resurrect Sam—Dean decides to live life to the fullest and exhibits a carefree attitude that troubles Sam, who is trying to find a loophole. Friend and fellow hunter Bobby Singer (Jim Beaver) informs the brothers about a supernatural sighting in Nebraska, which turns out to be demonic manifestations of the Seven Deadly Sins. While investigating, they meet Isaac (Peter Macon) and Tamara (Caroline Chikezie), a husband and wife team of hunters. Isaac and Tamara trail one of the demons to a bar, but discover that all the patrons are demonically possessed. The two are restrained, and Isaac dies after being forced to drink drain cleaner. Before the demons can target Tamara, Bobby and the Winchesters crash their car into the building. They throw the personification of Envy into the trunk, and drive away with Tamara. The hunters interrogate the demon and then exorcise it. Later that night, the other Sins track them down. During the scuffle, a mysterious blonde named Ruby (Katie Cassidy) saves Sam and kills three demons with a magical knife—demons are typically immune to physical harm—before departing. The rest of the Sins are exorcised. As Sam continues his research the next day, Dean reveals that a clause in his pact will end Sam's life if he tries to escape the deal
Supernatural (season 3) - Wikipedia, the free encyclopedia
Dean at the beginning of season 3 is the Dean I like to see! He does not get enough fun in his life!