<Tr> <Td_colspan="2"> ← Previous Season 2 </Td> </Tr> <Tr> <Td_colspan="2"> List of Star Trek: The Original Series episodes </Td> </Tr> <P> This is a list of episodes from the third and final season of the original Star Trek series . </P> <P> The season originally aired Fridays at 10: 00 - 11: 00 pm (EST) on NBC . The final episode aired on Tuesday, Sept. 2, 1969, at 7: 30 - 8: 30 pm (EST). </P>

Star trek the original series season 3 episode 3