The Mystery of the Cliffs is another odd entry in the TMNT franchise. This was an educational video commissioned by the U. S. Bureau of Land Management that aims to teach kids about the concept and caretaking of the country's natural resources and heritage sites.
In this, the four turtles (voiced by their VAs from the cartoon series, but are portrayed as suit actors who are wearing the costumes from the Coming Out of Our Shells Tour) are at the Arizona desert on the insistance of Master Splinter, as the rat hopes the event will help them to become better ninjas as well as better Americans. However, it soons become an adventure as Raphael goes missing, causing Leonardo, Michelangelo, and Donatello to explore a dwelling inside a cliff, even discovering a plot by two Foot Ninjas to steal priceless artifacts.
This is an okay short film, even if it is a bit cheesy. Cam Clarke, Rob Paulson, Barry Gordon, Townsend Coleman, and Peter Renaday are in this, reprising their cartoon roles as the TMNT and Splinter. Also, the film tells a good story, and afterwards, Donatello teaches the viewers about heritage sites and the importance of caring for them.
