Science Fiction Theatre was an early television anthology series (1955-1957) that extrapolated science as it was known in the 1950s. Themes such as space travel, UFOs and telepathy were common fare.
The following uses a concept that we take for granted today. The presentation has one main oversight, but it’s an easy one to miss. (Hint: The speed of light.)
Signals From The Moon Part 1
Signals From The Moon Part 2
Signals From The Moon Part 3