Every Star Trek Reference, Easter Eggs & Jokes In The Simpsons
25. I Cancelled Star Trek!
Season six, episode seven - Bart's Girlfriend - is widely regarded as one of The Simpsons' greatest episodes of all-time, complete with one of the show's best-ever guest appearances in Meryl Streep, who voiced Bart's love interest, Jessica Lovejoy.
The episode also brought with it one of the more revered Star Trek-related moments within the show when Abe 'Grandpa' Simpson yells that he was the one that got Star Trek cancelled. While you could view this as a nod to the series finale of Star Trek: The Next Generation in May 1994, seeing as this particular Simpsons episode first aired that November, it could also be a nod to the initial cancellation of Star Trek: The Original Series.
Given that TOS was taken off screens in 1969 and Abe is obviously one of the older characters in the show, it's entirely plausible that he was referring to this series instead. The scene depicts this as Abe having kept the secret to himself for years, as opposed to a few months.