The Turtles manage to infiltrate the TCRI building, discovering there is more to the employees and to the building itself than meets the eye. They manage to find an unconscious Splinter in a stasis tank, but soon find themselves transported to a place unknown.

.TMNT 2003 S01-E26 Search For Splinter (1/3)

.

.TMNT 2003 S01-E26 Search For Splinter (2/3)

.

.TMNT 2003 S01-E26 Search For Splinter (3/3)

.

.

Popularity: 20%

After a frustrating and exhaustive search for Splinter, the Turtles’ suspicions turn towards the Guardians. This suspicion leads them to an austere building with the company name TCRI—the same name on the canister of ooze responsible for their mutation. Following their only lead, the Turtles enlist April and Casey to help them get inside.

.TMNT 2003 S01-E25 Search For Splinter (1/3)

.

.TMNT 2003 S01-E25 Search For Splinter (2/3)

.

.TMNT 2003 S01-E25 Search For Splinter (3/3)

.

.

Popularity: 13%

With the Shredder defeated, his headquarters destroyed, and the Foot in disarray, the Turtles turn to a new problem: Master Splinter is missing. Angry and confused, Raphael impatiently heads out to find his sensei only to be thrust into a solo adventure helping a headstrong kid, Tyler, against ruthless mobsters.

.TMNT 2003 S01-E24 - Lone Raph and Cub - (1/3)

.

.TMNT 2003 S01-E24 - Lone Raph and Cub - (2/3)

.

.TMNT 2003 S01-E24 - Lone Raph and Cub - (3/3)

.

.

Popularity: 14%

With Baxter Stockman causing a problem for everyone, the Turtles work with the Shredder to stop him. Just as soon as Stockman is out of the way, the Turtles enter into a rooftop battle. With help from a mysterious group of warriors known as the Guardians, the Turtles enter into what looks to be a fight to the finish against the Shredder.

.TMNT 2003 S01-E23 “Return to New York, Part Three” (1/2)

.

.TMNT 2003 S01-E23 “Return to New York, Part Three” (1/2)

.

.

Popularity: 14%

Continuing their assault, the Turtles and Splinter encounter mutant clones in a Foot Genetics Lab and a near indomitable foe, the Foot Mystic Ninjas. The Turtles finally make it to the Shredder’s throne room, but they are interrupted by an exosuit-clad Baxter Stockman, who hopes to get revenge on both the Shredder and the Turtles.

.TMNT 2003 S01-E22 Return To New York Part (1/3)

.

.TMNT 2003 S01-E22 Return To New York Part (2/3)

.

.TMNT 2003 S01-E22 Return To New York Part (3/3)

.

Popularity: 12%

Thinking he has destroyed his enemies, the Shredder is not prepared for a surprise attack on his headquarters by the Turtles and Splinter. With April providing computer intel at the lair, the Turtles work their way up to the Shredder, floor by floor.

.TMNT 2003 S01-E21 Return To New York (1/3)

.

.TMNT 2003 S01-E21 Return To New York (2/3)

.

.TMNT 2003 S01-E21 Return To New York (3/3)

.

.

Popularity: 12%

Still recuperating at the old farmhouse, the Turtles try to keep themselves busy. Raphael helps Leonardo forge new katana blades while Michelangelo, Donatello and Casey deal with the overzealous Abigail Finn, who hopes to catch the legendary “Green Man of the Woods.

.TMNT 2003 S01-E20 - The Monster Hunter - (1/3)

.

.TMNT 2003 S01-E20 - The Monster Hunter - (1/3)

.

.TMNT 2003 S01-E20 - The Monster Hunter - (1/3)

.

.

Popularity: 14%

After barely escaping the Shredder’s attack, the Turtles, Splinter, Casey and April head to the old farmhouse of Casey’s grandmother. As Leonardo lies unconscious, each member of his family tells Leo a tale of his early adventures, hoping their voices will rouse him back to consciousness.

.TMNT 2003 S01-E19 “Tales Of Leo” (1/2)

.

.TMNT 2003 S01-E19 “Tales Of Leo” (2/2)

.

.

Popularity: 17%

After being thrown through a window into April’s apartment, Leonardo lies unconscious while his brothers and Master Splinter defend against waves of attacking Foot Ninja. Desiring revenge, the Shredder seeks to destroy the Turtles and their allies at any cost.

.TMNT 2003 S01-E18 “Shredder Strikes Back, Part Two” (1/2)

.

.TMNT 2003 S01-E18 “Shredder Strikes Back, Part Two” (2/2)

.

.

Popularity: 12%

During an early morning training run, Leonardo encounters a legion of Foot Ninja and Hun. A thunderstorm develops not long before Leo encounters a new foe, the Foot Elite. As he becomes overwhelmed, Leo witnesses the return of an unexpected enemy: the Shredder.

.TMNT 2003 S01-E17 “Shredder Strikes Back, Part One” (1/2)

.

.TMNT 2003 S01-E17 “Shredder Strikes Back, Part One” (2/2)

.

.

Popularity: 12%