The first season of (TMNT) varies significantly depending on which era of the franchise you are interested in. Across its history, Season 1 serves as the foundational introduction to the four brothers—Leonardo, Raphael, Donatello, and Michelangelo—and their mentor, Splinter. 1987 Original Animated Series
: It features a darker aesthetic with heavy shadows and no pupils in the Turtles' masks.
: Shredder, Krang, Bebop, and Rocksteady are introduced as the primary antagonists operating out of the Technodrome . Teenage Mutant Ninja Turtles Season 1
: The season concludes with the Turtles infiltrating the TCRI building , discovering their origin's link to the Utrom aliens, and Splinter mysteriously disappearing. 2012 Animated Series (Nickelodeon)
: It introduces the mutation of Hamato Yoshi into Splinter and the Turtles' first meeting with reporter April O'Neil . The first season of (TMNT) varies significantly depending
: Reviewers from IGN praised the season for its "fluid, fast-paced" action and its "show within a show," Space Heroes .
: Critics from Rotten Tomatoes note it as "hip, playful and witty," though it is famously more comedic and campy than the original Mirage comics. 2003 Animated Series (4Kids) : Shredder, Krang, Bebop, and Rocksteady are introduced
: Major arcs include the "Notes from the Underground" trilogy and "The Shredder Strikes Back".