4x19 Jump the Shark

In [Πρέπει να είστε εγγεγραμμένοι και συνδεδεμένοι για να δείτε αυτόν το σύνδεσμο.], a 19-year-old boy named Adam calls Sam and Dean looking for their father, John, claiming to be his son. Dean and Sam suspect that Adam is a monster trying to lure them into a trap, but find out that John was indeed the boy's father. Unlike his half-brothers, Adam has had no experience with hunting or the supernatural until the recent disappearance of his mother. Sam tries to teach Adam to hunt so that he may defend himself in the future. Dean goes alone to find the thing that killed Adam's mother and is trying to kill Adam. Eventually, he gets trapped in a crypt with no way out, where he finds the real Adam's corpse; the Adam that is with Sam is the [Πρέπει να είστε εγγεγραμμένοι και συνδεδεμένοι για να δείτε αυτόν το σύνδεσμο.] who killed and ate Adam to take on his form. The ghoul and his sister, in the form of Adam's mother, ambush Sam. They had wanted revenge on John for killing their parents years ago, but since they cannot kill him as he had already died in the [Πρέπει να είστε εγγεγραμμένοι και συνδεδεμένοι για να δείτε αυτόν το σύνδεσμο.], they decide to kill his remaining sons instead. Dean returns in time to kill the ghouls and save Sam from being eaten alive. Afterward, they give Adam a hunter's funeral to honor the half-brother they never knew.