when does dean and sam find their dad
John Winchester (Supernatural) The father of series protagonists Sam and Dean Winchester, John Winchester first appears in the pilot episode of the series, but plot devices such as flashbacks and time travel detail his background in later seasons. Apparently abandoned by his father at a young age—his father actually died while serving a secret order known as the Men of Letters—John Winchester grew up hating the man.[3] John left high school to join the Marine Corps, eventually attaining the rank of corporal and receiving many medals for his service in Vietnam. After leaving the service, he found a job as a mechanic, and fell in love with Mary Campbell.[4]