Rita's Pita - S3-E25
Revealing mistake: The "giant ice cream" that the Rangers get for Tommy is so obviously not ice cream - it is more similar to rubber.
Master Vile and the Metallic Armor (3) - S3-E30
Plot hole: In this episode Globbor's energy is drained when Alpha stops the Solar Eclipse, and his Energy drains in the sunlight and severed the physical link between him and Ninjor. This is strange because in the previous episode Globbor had no trouble fighting in the sunlight, and the link stayed intact in the sunlight.
Plot hole: The whole "reverse time" thing is messed up. Master Vile claims that everyone has been changed back to children. So where would the adults we see for the remainder of the series come from? The Rangers are all about 20, and they're turned back into about 10 year olds. Why is Lt. Stone turned back approximately 30 years, into a 10 year old? It can't be that the reversal was different for each person, as Master Vile claims everyone is a child again. Very confusing.
Stop the Hate Master (1) - S3-E12
Continuity mistake: Bulk has stepped on Skull's hand. We see a close-up of Bulk's foot on Skull's hand. When we cut to a wide shot of Bulk and Skull, Bulk's foot is no longer on Skull's hand, yet Skull is still squirming like his hand is trapped - as evident by Skull pulling his hand to get it free, and holding it when Bulk walks away.
Master Vile and the Metallic Armor (2) - S3-E29
Continuity mistake: Pink Ranger is suppose to be in Lord Zedd's palace, but after Yellow Ranger says "hope Kat and Tommy are all right" she can be seen in the back.
Master Vile and the Metallic Armor (1) - S3-E28
Continuity mistake: When the Rangers are riding horses Billy's shirt changes from a dark blue tank top to a blue striped T-shirt and back.
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 ★