The original pilot episode, produced in 1964/1965, did not air during the run of the series on NBC.
It aired for the first time in 1988 in syndication as part of a special called
"The Star Trek Saga: From One Generation to the Next". It has now been added to the
Star Trek syndication/cable package along with the 79 episodes that aired on NBC, therefore
becoming the 80th Star Trek episode.
For the 1988-1989 television season there were an estimated 90,400,000
TV households. The rating is the percentage of TV
households so for this season each rating point represents 904,000 households.
TV stations had a 2 week window (shown in the Air Dates column) to show this episode.