It's been 30 years since Mighty Morphin Power Rangers debuted — and almost as many iterations of the Rangers have existed in the decades since five teenagers with attitude first accessed the Morphin Grid.

There are certainly superfans who've kept up with the franchise, but for those of you in need of a refresher ahead of watching Netflix's new scripted anniversary special Mighty Morphin Power Rangers: Once & Always (launching April 19), we've got you covered.