Castiel tells Sam, Dean and Bobby about the war in Heaven and how he and Raphael became enemies. Bobby believes Castiel is hiding something, but Dean refuses to believe it. Watch free, streaming full episodes of Supernatural on cwtv.com. Supernatural Video: Watch supernatural full episodes, previews, clips, interviews and more video. Supernatural stars Jared Padalecki as Sam Winchester and Jensen Ackles as Dean Winchester. In Supernatural, Sam and Dean cruise America’s highways in their 1967 Chevy Impala, battling supernatural threats.