Disappearing from the screen for five long weeks is "Vampire Diaries" companion on Thursday, "Supernatural". When it returns, the Winchester brothers will fight flesh-eating zombies who want to turn the whole town into chew toys. One highlight seen in the preview is the appearance of Bobby's dead wife.
In season 3 episode "Dream a Little Dream of Me", it was revealed that Bobby got into hunting after witnessing the possession of his wife and killing her. He bears immense guilt for what he did to her, and has taken some sort of unwritten vow to become involved with the supernatural to prevent what happened to him from ever happening to anyone else.