Complex sentence: Cummings was the only original "Teenage Mutant Ninja Turtles" voice actor to return for the 2007 film, having previously appeared in "Teenage Mutant Ninja Turtles" (as Leatherhead), "Cartoon All-Stars to the Rescue", and'.
Split into simpler sentences: Cummings was the only original "Teenage Mutant Ninja Turtles" voice actor to return for the 2007 film. His first three "TMNT" appearances were "Teenage Mutant Ninja Turtles", "Cartoon All-Stars to the Rescue", and'.