Episode 27 of "Ghost Whisperer"
s02e05 A Grave Matter

When Melinda visits Andrea's gravesite, she meets a confused ghost who says he's buried in the wrong grave. At first, the ghost can't identify himself to Melinda, but he claims that the widow weeping at the graveside every day is not his wife. Slowly, the ghost is able to remember things about his life and confesses to Melinda that he abandoned his wife and young daughter, which mirrors Melinda's own background. As Melinda tries to put aside her personal feelings, she attempts to unravel the mystery of who is buried in the grave.