the Winchesters to investigate the disruption to the timeline, although the Winchesters are able to kill Zachariah and banish Castiel. While the Winchesters debate about their next course of action before the new timeline changes them as well as everything else, they are eventually forced to send John back to his time believing that his trip to the future was just a dream, but he departs accepting his fate and assuring Dean and Sam that he understands their decision, also adding that he is proud of the men his sons have become. After Mary is accidentally killed by the Nephilim Jack Kline in "Absence", Castiel attempts to retrieve her from Heaven, but decides to leave her alone when he finds that she is with John Winchester once again, affirming that John went to Heaven after his escape from Hell. In the next episode, the angel Dumah confirms John and Mary are sharing a Heaven together and threatens to end their peace with a snap of her fingers to force Castiel to comply with her demands. In retaliation, Castiel kills Dumah with an angel blade to protect John and Mary and end her reign of terror. In the series finale, "Carry On", Dean arrives in Heaven after his death and meets with Bobby Singer, who confirms that John and Mary are still together in their own little piece of heaven. After Sam dies and arrives, it is assumed that the two brothers go to reunite with their parents as a family for the first time since the very beginning of the series (although this is never shown). The Winchesters On March 23, 1972, John returns home from the Vietnam War and meets Mary Campbell. Having received a letter from his long-missing father Henry, John is drawn to a Men of Letters clubhouse in Lawrence, Kansas where Mary saves him from a demon. In the clubhouse, John learns that his father is a Man of Letters and becomes involved in Mary's hunt for her missing father Samuel who was after a magical box that can trap and destroy monsters. Introduced to the world of the supernatural, John quickly becomes enamored with both hunting and Mary, helping her to find the box in a New Orleans cemetery and slaying a loup-garou watchdog. Now aware of the dangers of the world, John decides to become a hunter, telling his mother that he feels that