Big Sisters - S1-E7
Visible crew/equipment: When Maria gets down off the Megazord's hand to get into the Rad Bug you can see a driver in the front seat despite the fact that it's supposed to be empty and being controlled remotely. (00:15:21)
For Whom the Bell Trolls - S1-E9
Visible crew/equipment: During the big fight at the end between Ticklesneezer and Megazord you can see a child crouching down next to Megazord at one point. It's hard to miss, bottom right of the screen, and he's wearing green clothing. This is due to the original sentai footage featuring the oversized child in the megazord battle and the Americanized version not editing them out. (00:16:55)
Answer: According to the IMDB, there are currently 10 different series (with an 11th premiering in 2006). And, as far as I can tell, there have been only two theatrically released movies. All of the series, with the exception of the first one (that premiered back in '93) are spin-offs of the original, and they all share similar plot lines, characters, etc.
Cubs Fan ★