<P> NBC canceled the show after three seasons ; the last original episode aired on June 3 , 1969 . The petition near the end of the second season to save the show signed by many Caltech students and its multiple Hugo nominations would , however , indicate that despite low Nielsen ratings , it was highly popular with science fiction fans and engineering students . The series later became popular in reruns and found a cult following . </P>
<P> NBC canceled the show after three seasons ; the last original episode aired on June 3 , 1969 . The petition near the end of the second season to save the show signed by many Caltech students and its multiple Hugo nominations would , however , indicate that despite low Nielsen ratings , it was highly popular with science fiction fans and engineering students . The series later became popular in reruns and found a cult following . </P>
when did star trek go off the air
when did star trek go off the air
June 3 , 1969
June 3 , 1969