Overall, Supernatural is a fantastic show that demonstrates the undying bond between two brothers and the love they have for one another. We also see the continuous fight between Good and Evil, both depicted with Religions symbols and themes. 

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Sam and Dean, with the help of Cas and even Crowley over the many episodes and seasons have defeated many different supernatural beings, including monsters, ghosts, vampires, and many more. Together they have also battled with demons and angels in order to protect themselves and the human race from pain and suffering. 

 

With the Winchesters fighting monsters and darkness in order to save the country from supernatural beings, we see all types of Evil in the world, but we also see the continuous struggle within ourselves to stay on the good side of the battle. With Sam fighting his demonic powers within, from the demon blood he was fed as a baby, and Dean doing anything and everything to protect his little brother, we sometimes question if they are evil themselves, but in the end good wins and we see the Winchesters come out on top of all evil. 

 

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