When Sam Winchester was an infant, and his brother Dean Winchester was only four years old, their mother, Mary, was murdered on November 2, 1983 (All Souls Day). Her husband, John, saw blood dripping onto Sam's cradle, looked up, and found his wife pinned to the ceiling, her midsection sliced open. A moment later, she burst into flames. John told Dean to take baby Sam outside and tried to make a desperate and futile attempt to save his wife while the house was consumed by flames.
After a psychic told John that something of the supernatural was responsible for Mary's death, he became obsessed with finding and destroying the thing that killed his wife and in the process trained his sons to recognize and defend themselves against paranormal entities. At a young age, both Sam and Dean became resourceful sleuths and experienced fighters assisting their father in his quest to destroy dangerous creatures and find the Demon that had killed their mother. However, Sam rebelled against the lifestyle his father chose for him, eventually having a falling out with his father and leaving to live a "normal" life. He attended Stanford University on a full scholarship and lived with his girlfriend, Jessica Moore, in an apartment near campus. But when Dean, after two years of estrangement, appears one night on Sam's doorstep during the autumn of his senior year, bearing the news that their father has gone missing while on a "hunting trip". Sam reluctantly agrees to help Dean in the search.
The brothers trace John to Jericho, California, where they find more clues about their father's possible location and help solve the ghost murder mystery their father had been working on before he disappeared. After all was said and done however and John was yet to be found, Sam declines his brother's invitation to continue the search and conduct more hunts, opting instead to return to his life with Jessica. Unfortunately, shortly after arriving back in his apartment, he finds her pinned to the bedroom ceiling, bleeding from the abdomen. As Sam watches helplessly she bursts into flames and dies in the same manner as his mother, twenty-two years to the day afterwards. Dean rescues his brother from the burning apartment, and the bereaved Sam decides to join Dean in the search for their father who may have answers about the demon who killed his mother and his girlfriend. In Dean's 1967 Chevy Impala, the Winchester brothers pick up John's trail, traveling the back roads and small towns of the continental United States in the process.
Eventually the brothers locate their father, and he reveals the extent of his knowledge of the demon that killed Mary, and his intention to kill it. At first he opposes the boys' involvement because he fears losing them, but eventually he yields. Together, the Winchesters search for a special weapon: the Colt, which was created during the Battle of the Alamo and at the time of Halley's Comet passing. Being made by the legendary Samuel Colt, for a hunter, the gun has the ability to destroy any creature, with a well placed shot. All three Winchesters, after recovering the Colt from a band of vampires, band together and start to hunt the demon in earnest. However, due to a series of catastrophic events (beginning with John's capture), they are eventually overpowered by the demon. While possessing John the demon nearly tortures Dean to death before Sam is able to and shoot it in the leg with the Colt. Sam tries to rush Dean and John to the hospital, but a demon then possesses a semi truck driver and plows into Dean's Impala. Demolishing it and leaving all three Winchesters incapacitated inside the wreckage.
See Also: Supernatural Season One | Season One Episodes | Buy Season One