Teenage Mutant Ninja Turtles - Season 01

On one normal night in New York city, 4 fully grown Mutant Turtles do their evening training with Master Splinter at their Sewer Den below New York. They’ve spent their 15 years with their sensei, Master Splinter and learning the arts of Ninjitsu. They’ve never reveal themselves to the outside world, due to their appearances. As it would lead them to trouble. What happens next to them?