“Sam and Dean investigate Bobby’s home town where the dead are rising from the grave but instead of attacking humans, they are happily reuniting with their families. The brothers turn to Bobby for help but he tells them not to worry about it and to leave town. Suspicious, Dean investigates and comes face to face with Bobby’s dead wife who has no memory of what happened to her. Once the zombies start turning evil, the boys tell Bobby he has to kill his wife but he refuses.”
This episode is written by Jeremy Carver.
And for fans of continuity, note that the actress playing Bobby’s wife (Carrie Anne Fleming) is NOT the same actress who appeared as his wife during the dream sequences in “Dream a Little Dream of Me.” However, according to IMDB, Fleming did have a previous role on the show as a nurse back in the season 2 premiere, “In My Time of Dying.”