Episode Details

In tonight’s Dead Letter, we explore a mysterious phone call received by long-time listener Michelle in the 1980s.  The caller identified himself as "Uncle Bill," a relative she had never known, leaving a lasting impression on her and her family.  Her parents' stunned reaction to the call adds to the unsettling mystery.

https://en.wikipedia.org/wiki/Night_Call_(The_Twilight_Zone)

https://www.snopes.com/fact-check/last-call-3/