Bobby asks the Winchesters for help when his fellow hunters are being torn apart by vengeful spirits. Sam is haunted by FBI Agent Henrickson whose ghost accuses Sam of failing him. Sam and Bobby realize they are being haunted by the spirits of the people they couldn't save, which is known as "The Rising of the Witnesses." Meg Masters
and two twin girls also appear and haunt Dean, Sam, bella and Bobby. The 4 find and perform a spell to put the Witnesses to rest. Later, Castiel appears to bella in a dream and reveals that "The Rising of the Witnesses" is one of many seals which are being broken by Lilith in order to bring on theApocalypse, in whichLuciferthefallen angelwill walk the earth free