From here, everything in the show is revolves around Sam and Dean emotional and dramatic relationship as they battle angels, demons and even each other. The clearest example of this would be the season five finale, after Sam has been possessed by Lucifer, Dean, angel Castiel (Cas), and the boys surrogate father Bobby Singer, try to exorcise Lucifer and put him back in his cage, which was created by God. After killing both Cas and Bobby, Sam/Lucifer starts to beat Dean, who doesn’t resist. As Sam goes to land another blow, he glances into the Impala and suddenly all his memories of life with Dean rush at him, allowing Sam to take control over Lucifer. At this point, Sam sacrifices himself for Dean by throwing himself into Lucifer’s cage. This scene shows that in the end, in the fight between good and evil, angels and demons, destiny and God himself, Sam and Dean choose family over everything else.
Similar to horror films, Supernatural