Teenage Mutant Ninja Turtles (1987): Season 5, Episode 18

5 - 18: Leonardo, Renaissance Turtle

A mad professor named Mindbender creates a law-enforcement robot named "LEX" to clean up crime in New York, but LEX ultimately starts arresting numerous innocent people for the smallest infraction. With the other Turtles unreachable, Leonardo must discover his own innate skills to stop this rogue robot before he and Mindbender declare themselves dictators of the city.