4x13 After School Special

Sam and Dean discover that a spirit is haunting one of their old high schools. While investigating the haunting, Dean and Sam relive their high school experiences through flashbacks, recalling how Sam ([Πρέπει να είστε εγγεγραμμένοι και συνδεδεμένοι για να δείτε αυτόν το σύνδεσμο.]) was picked on by the school bully while Dean ([Πρέπει να είστε εγγεγραμμένοι και συνδεδεμένοι για να δείτε αυτόν το σύνδεσμο.]) was Mr. Popular. Initially, they believe it to be the ghost of a friend of Sam's who killed himself the year after they left, but when the ghost attacks Sam and calls him by name even after they burn the friend's bones, they realize it's someone else. They learn that the ghost haunts the bus and possesses people there and realize the bus driver is the father of the kid who bullied Sam, Dirk. Sam beat him in a fist-fight before they left the school and gave him the nickname "Dirk the Jerk." The brothers learn from Dirk's father that he died at age 18 before graduation and that he lived a hard life, losing his mother shortly before Sam met him and gaining a lot of anger as a result. He got picked on a lot and kids called him "Dirk the Jerk." After learning that Dirk was cremated and that he is tied to a lock of hair kept on the bus, Sam and Dean confront Dirk while he possesses two people and Dean burns his hair, destroying Dirk's spirit. In the end, Sam visits a teacher who gave him the advice to follow his own path in life, but is unable to respond when asked if he's happy.