<P> Bobby makes his debut in the first season finale `` Devil 's Trap '' , and is revealed to be an old friend of the Winchester family . Sam and Dean Winchester seek his help when their father John is kidnapped by demons . From his extensive collection of supernatural - related literature and resources , Bobby shows the brothers how to create a devil 's trap -- mystical symbols capable of rendering a demon powerless -- and later assists in the exorcism of the demonic Meg Masters . After John 's death in the second - season premiere , Bobby allows the brothers to stay at his home to rest up and rebuild the recently - crippled Impala . He continues to assist them when they require additional expertise in their hunts , rescuing a demonically - possessed Sam and dealing with a Trickster . In the second - season finale , Bobby helps Dean to locate a missing Sam , but they both watch in horror as he is fatally stabbed in the back . Bobby begs Dean to bury Sam , and is distraught when he learns that Dean has sold his soul to a demon for Sam 's resurrection . When the hunters learn of the demon Azazel 's plan to open a Devil 's Gate -- a gateway to Hell -- they rush to stop him . The gateway is temporarily opened , releasing hundreds of other demons into the world , before Bobby and Ellen Harvelle close it again . </P>
<P> Bobby makes his debut in the first season finale `` Devil 's Trap '' , and is revealed to be an old friend of the Winchester family . Sam and Dean Winchester seek his help when their father John is kidnapped by demons . From his extensive collection of supernatural - related literature and resources , Bobby shows the brothers how to create a devil 's trap -- mystical symbols capable of rendering a demon powerless -- and later assists in the exorcism of the demonic Meg Masters . After John 's death in the second - season premiere , Bobby allows the brothers to stay at his home to rest up and rebuild the recently - crippled Impala . He continues to assist them when they require additional expertise in their hunts , rescuing a demonically - possessed Sam and dealing with a Trickster . In the second - season finale , Bobby helps Dean to locate a missing Sam , but they both watch in horror as he is fatally stabbed in the back . Bobby begs Dean to bury Sam , and is distraught when he learns that Dean has sold his soul to a demon for Sam 's resurrection . When the hunters learn of the demon Azazel 's plan to open a Devil 's Gate -- a gateway to Hell -- they rush to stop him . The gateway is temporarily opened , releasing hundreds of other demons into the world , before Bobby and Ellen Harvelle close it again . </P>
how is bobby related to sam and dean
how is bobby related to sam and dean
old friend
old friend