Did I spell continuity right? Well as long as you got the point and blah blah blah.
Now I keep hearing that SPD is out of continuity? Why was that? I don't understand so someone explain. I don't give a rat's ass about the Sentai footage/storylines or the useless episodes. Just give it to me strait.
The only thing I can think of is that Tommy and Zeltrax weren't mind-wiped at the end. Now you can easily fanfic away Tommy never mentioning it (e.g. when he realised that the other rangers didn't remember, he assumed that it was for a good reason and decided to keep his mouth shut) but Zeltrax never mentioning it is a little less believable (especially considering how much whining he did) is less believable.
As a season, its' own continuity was god-awful, as far as long term PR continuity goes, it served it as well as other one season shows have, give or take a few stupid in jokes with the props.