Episode 2.04: Children Shouldn't Play With Dead Things (fka "Afterlife")
Airdate: October 19, 2006

09/30 - Dean and Sam investigate the murder of a college student (guest star Summer Glau) who has come back from the dead seeking revenge on those who mistreated her while she was alive. Upon confrontation, the ghost savagely attacks Sam, leaving him injured. While in town, the brothers visit their mother's grave to pass along something from their father (Jeffrey Dean Morgan's). Source: The CW