The Winchesters series explores the lives of Sam and Dean's parents, John Winchester and Mary Campbell, and reveals secrets about their past. In season 1, episode 3, "You're Lost Little Girl," John and Mary investigate the disappearance of a young girl and meet Betty, a police officer who has a history with John. It's revealed that John had given Betty an engagement ring before being shipped out to Vietnam, but they never got engaged. Betty's story will be further explored in future episodes of The Winchesters.
