<P> As the search for John continues, Sam argues with Dean constantly--mostly about the way Dean obeys his father's orders without question, while Sam questions them and resents his father's treatment of them as "loyal little soldiers". The brothers eventually split up, with Dean going to investigate a mystery his father has assigned him while Sam decides to search for their father elsewhere . The two are eventually reunited after Dean apologizes . </P> <P> Later in the season, John is captured by demons, and the brothers manage to rescue him . However, they soon learn that the demon who killed their mother is in possession of their father's body . Though John begs Sam to kill him, Sam instead shoots John in the leg using the Colt, and the demon escapes . As Sam drives his father and a badly wounded Dean to a hospital, a truck driven by a demon - possessed man crashes into them, totaling Dean's Impala and gravely injuring the Winchesters . </P> <P> At the beginning of the second season, the Winchesters are at the Nashville hospital, with Sam and John escaping with minor injuries, while Dean is on the brink of death . In a deal with Azazel, John sacrifices his soul and the Colt in exchange for Dean's life . While the boys mourn their father's death, Sam expresses much guilt about never having a chance to reconcile with John, leading him to believe that his father died knowing his own son hated him . </P> <P> As the boys start to take a more active role in hunting, Sam begins to search for psychic children like him to find out Azazel's plan . Eventually Sam learns from Dean that, before their father's death, John told Dean that Azazel is planning to turn Sam evil, and that Dean must either save him or kill him . Although angered at his father and brother upon learning this revelation, Sam decides to save as many people as possible so that he can change his destiny . In the season finale, Sam is transported to an abandoned town along with Azazel's other chosen children . There he learns Azazel's plans: he and the other children must kill one another until there is one survivor--who will lead a demon army (as the Antichrist). Sam also discovers that Jessica was killed because her death would lead Sam back into hunting and Mary interrupted Azazel during the process of feeding Sam demon blood, and thus was killed . It is also revealed that Mary somehow knew Azazel . Although Sam tries to protect the other children, various fights ensue, and the children are killed off one by one . Eventually, only Jake Talley and Sam are left, at which point Sam is stabbed by Jake . Sam dies in Dean's arms . </P>

What episode of supernatural does sam lose his soul
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