The only canonical Star Trek is Roddenberry's novelization of The Motion Picture and Admiral Kirk's preface therein.After extensive research, I can finally reveal the true Star Trek canon, and put a stop to these debates.
Only the following episodes are canon, everything else is not.
- The Man Trap
- A Matter of Perspective
- Gambit Part 2
- Honor Among Thieves
- Star Trek: Nemesis, but only the bit where Riker's getting beaten up in the Jeffries Tubes near the end
- A Space Adventure Hour
- Every episode of Star Trek: Scouts
Hope this ends the canon wars!
All other versions of Star Trek are unreliable, exaggerated dramatizations of the Enterprise's logs and other Starfleet records.
(I kid. I kid because I love. Also, I kid, because, like Krusty, I am an unfunny clown.)