Old-Time Radio Theme Month, Day 16: "Mark My Grave"
Being halfway through the month, the "weirdness" factor of the old-time radio shows I'm presenting are about to ratchet up. Straddling the line between full-on supernatural horror is "Mark My Grave," an episode of Inner Sanctum from January 17, 1949. In this tale, a reporter investigating a couple's disappearance meets an odd family who claim to be haunted by their own father, whose ghost will be coming to claim each of them. This being Inner Sanctum, you may assume it's all a plot with no real ghosts involved. Don't be too sure.
You can download a copy of this radio show from archive.org here.