
Season 3 is charactarized by the Technodrome being located at the Earth's core.
Season 3 of the 1987 Teenage Mutant Ninja Turtles TV series originally aired in broadcast syndication on Mondays to Friday afternoons between 25 September and 22 December 1989. It totally consists of 47 episodes.
The season is characterized by the Technodrome being located at Earth's core, after being sent there by the Turtles in the Season 2 finale "Return of the Technodrome". Because of that, Shredder, Krang, Bebop and Rocksteady rely on travelling in Transport Modules between the Technodrome and the surface of the Earth. Many episodes deal with them looking for Technodrome fuel, usually ending up defeated by the Turtles.
Season 3 also sees the introduction of episodes with other antagonists than Shredder and Krang. In these episode, the Turtles fight characters like Leatherhead, the Rat King and Don Turtelli.
The season ends with the Big Trilogy where Shredder, Krang, Bebop and Rocksteady succeed in bringing the Technodrome to Earth's surface again, but at the end the Turtles defeat them and send the Technodrome to Dimension X.