Starring James Drury, NBC's The Virginian first aired on television in 1962. Running for nine years, it is the third longest aired Western in American television history.
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The singing duo did appear on several TV series but I could find nothing for The Virginian.
The ranch was called Shiloh in the TV series The Virginian.
You can read more about The Virginian, the television series that ran in the 1960s, below. In the references you may be able to discover the answer you want about its 'supposed background'.
University of the Air - TV series - ended in 1983.
University of the Air - TV series - was created in 1966.
The duration of Off the Air - TV series - is 660.0 seconds.
The duration of Air Power - TV series - is 1800.0 seconds.
The duration of University of the Air - TV series - is 1800.0 seconds.
The duration of Into Thin Air - TV series - is 2700.0 seconds.
The duration of Something in the Air - TV series - is 1500.0 seconds.
Open Air - TV series - ended in 1990-03.