<P> When Sam was only six months old , his mother Mary was killed by the demon Azazel , whom his mother walked in on while he was feeding Sam demon blood . Sam is saved from the ensuing fire by his father , who then gives him to a four - year - old Dean to carry outside . Since that moment , Dean has felt responsible for Sam and became Sam 's protector , partially due to pressure from their father to keep his brother safe . </P>
<P> When Sam was only six months old , his mother Mary was killed by the demon Azazel , whom his mother walked in on while he was feeding Sam demon blood . Sam is saved from the ensuing fire by his father , who then gives him to a four - year - old Dean to carry outside . Since that moment , Dean has felt responsible for Sam and became Sam 's protector , partially due to pressure from their father to keep his brother safe . </P>
when does sam start to drink demon 's blood
when does sam start to drink demon 's blood
Sam was only six months old
Sam was only six months old