Teenage Mutant Ninja Turtles is an American CGI cartoon series developed by the Nickelodeon Animation Studio in the franchise of the same name. A one hour sneak peek was released on September 28, 2012, while the official premiere aired on Nickelodeon on September 29, 2012. The series premiered in the United Kingdom and Ireland on October 1, 2012 and in Australia along with New Zealand on October 8, 2012.
The show proved to be popular with both audiences and critics, garnering 3.9 million viewers on its premiere night and hit a ratings high for Nickelodeon with boys 2-11, making it the network's top-rated premiere for an animated series since 2009. During its premiere weekend the series reached nearly 12 million total viewers. The premiere's success prompted Nickelodeon to order a second season and in February 2013, the network renewed the show for a third season.The series makes slight changes to the Teenage Mutant Ninja Turtles continuity, notably Michelangelo's new catchphrase is "Booyakasha" instead of "Cowabunga" and his brother, Raphael, also has an un-mutated pet turtle named Spike. The series follows the four Ninja Turtles living in the sewers of Manhattan, where they're being trained in martial arts by the ratlike Master Splinter. Merchandise based on the series includes a new line of Teenage Mutant Ninja Turtles consumer products, and six LEGO sets.
After Viacom purchased the rights to the Teenage Mutant Ninja Turtles franchise in October 2009, a press release was issued unveiling that Nickelodeon would be developing a new CGI-animated television series slated to air in 2012. Though the franchise was brought out from Mirage Studios, the company is still able to publish up to 18, 48 paged black and white TMNT comics a year. Additionally, toy products would continue to be made through Playmates and the rumors of a new live-action TMNT movie were put to rest as the company also revealed that they'd be making a film for 2012 with Paramount Pictures, though the date has seen been pushed back.
At the time, details on the series were scarce. From March 2011, new details about the show were released to the public. Ciro Nieli, executive producer, cited that the series would be slightly different than past incarnations. The turtles will now have "more individual attributes" that will tell them apart, wereas previously they could only be distinguished by the color of their masks, the color of their skin and their weapons. Also, Michelangelo's traditional nunchaku would be replaced by kusari-gama. Along with this wealth of new information, a first glimpse of the show was released alongside an initial promotional image.
More information was unveiled at an invite-only fan event in March 2010. These details, however, were from a work-in-progress version of the series, and have the opportunity to change in the final product. Some details that have been made known, however, including a teenage April, Hamato Yoshi becoming Splinter, and The Kraang, an homage to many different entities in TMNT lore (Kraang/Utroms/Foot Soldiers). The series is said to have the dark elements and intense action of the 2003 TV series, but still have the jokes of the 1987 series while still being something of its own.
Images of the turtles, Master Splinter, April, Shredder and the Kraang have all been revealed. Some confirmed changes to the series are Donnie having a crush on April, Master Splinter being younger and having a more active role in the series, and Splinter training April to be a ninja so she can go out and battle enemies with the turtles. Mikey and Don can also extend their weapons into blades. Leo will also still be the skilled leader, albeit younger than Don and Raph, (who will still be a hot-head).
Sometime in March 2011, a micro site for the new series was leaked on Nickelodeon's website. The micro site revealed pictures of April, Shredder, the Kraang, and Splinter with bios for all of them. The site was shut down for some time, but as of June 2011, it is back up and features a personality quiz, bios for the turtles, a newsletter, a new game called Dark Horizons, and the new trailer for the series. Merchandise for the series is already starting to get made, including action figures from playmates which will be released in August 2011, a set of stickers, Halloween costumes, and books based off the series.
An official trailer was released on June 23, 2011 and aired on Nickelodeon the following Saturday. The trailer revealed the turtle's new voices, the animation, and that the theme song of the new show will be a remixed/remade version of the original theme song from the 1987 cartoon.
Jason Biggs originally voiced Leonardo and Rob Paulsen, who voiced Raphael in the 1987 series, portrays Donatello. In June 2011, it was confirmed that Sean Astin is playing Raphael and Greg Cipes is Michelangelo. In August 2011, it was revealed that Mae Whitman will be the voice for April O'Neil. In April 2012, it was announced that Phil LaMarr will be playing the role of Baxter Stockman and Nolan North will be playing a race of aliens known as The Kraang. Actress Kelly Hu confirmed her role as Karai in May 2012.
Nickelodeon has ordered three seasons, all of which will have 26 episodes. Season 1 premiered on September 29, 2012. The premiere of season 2 was on October 12 2013. Season 3 has been announced on February 26, 2013. Season 4 has been announced on June 17, 2014.
- Leonardo (Jason Biggs, Seasons 1-2), (Dominic Catrambone, various episodes in season 2), (Seth Green, Season 3)
- Donatello (Rob Paulsen)
- Raphael (Sean Astin)
- Michelangelo (Greg Cipes)
- Hamato Yoshi/Splinter (Hoon Lee)
- April O'Neil (Mae Whitman)
- Casey Jones (Josh Peck)
- Hamato Miwa/Karai (Kelly Hu)
- Oroku Saki/Shredder (Kevin Michael Richardson) and the Foot Clan
- The Kraang (Nolan North)
- Chris Bradford/Dogpound/Rahzar (Clancy Brown)
- Xever/Fishface (Christian Lanz)
- Baxter Stockman/Stockman-Fly (Phil LaMarr) and his Mousers
- Tiger Claw (Eric Bauza)
- Ivan Steranko/Rocksteady (Fred Tatasciore)
- Anton Zeck/Bebop (J.B. Smoove)
- Purple Dragons
- Mr. Murakami (Sab Shimono)
- Kirby O'Neil (Keith Silverstein)
- Leatherhead (Peter Lurie)
- Spike/Slash (Corey Feldman)
- Dr. Tyler Rockwell/Monkey Brains (Frank Welker)
- Dr. Victor Falco/Rat King (Jeffrey Combs)
- Timothy/The Pulverizer/Mutagen Man (Roger Craig Smith)
- Carlos Chiang O'Brien Gambe (Jim Meskimen)
- Fungus Humungous (Fred Tatasciore)
- Snake/Snakeweed (Danny Jacobs)
- Vic/Spider Bytez (Lewis Black)
- Pete, the Pidgeon (A.J. Buckley)
- Mrs. Campbell (Cassandra Peterson)
- Newtralizer (Danny Trejo)
- Parasitica Wasp
- Biotroid (Nolan North)
- Chrome Dome
- Irma (Kate Micucci)
- Ice Cream Kitty (Kevin Eastman)
- Jack Kurtzman (Robert Forster)
- 1987 Turtles  
- Sir Malachi (Paul Reubens)
- Antonio/Pizza Face (John DiMaggio)
- Long-Tongue Worms
- Living Atoms
- Kraang Subprime (Gilbert Gottfried) 
- Ho Chan (James Hong)
- Bigfoot (Diedrich Bader)
- The Finger (Jesse Ventura)
- Mrs. O'Neil Clone (Renae Jacobs )
- Punk Frogs
- Dream Beavers
- Speed Demon (Steve Blum)
- Dr. Cluckingsworth
Confirmed Characters Yet To Appear
- Fugitoid 
- Flaming Carrot
- Mondo Gecko (Robbie Rist)
- Muckman and Joe Eyeball
- Hun (Eric Bauza)
- Renet (Ashley Johnson)
Confirmed Actors With Roles Yet To Be Confirmed
- Andrea Romano (Voice Director)
- Ciro Nieli (Executive Producer)
- J.R. Ventimilia (Executive Producer)
- Joshua Sternin (Executive Producer)
- Kenny Byerly (Staff Writer)
- Russ Carney (Staff Writer)
- Ron Corcillo (Staff Writer)
- Peter DiCicco (Script Coordinator)
- Michael Chang (Animation Director)
- Alan Wan (Animation Director)
- Ant Ward (Supervising Producer)
- Alex Deligiannis (Art Department)
- Juan Jose Meza-Leon (Animation Director)
- This is the first series in which each turtle has a definitive spotting detail, beyond the colored masks, skin color, and weapons
- Michelangelo has freckles, a childlike face, and is the shortest.
- Donatello has diastema (a gap between the front teeth), and is the tallest and leanest of the brothers.
- Raphael has a lightning bolt chip broken off on the top right of his plastron. He is also the 2nd shortest.
- Leonardo has, for the most part, been unchanged, but if you look closely, you can see that his skin is a darker shade of green from the others, and he's also the second tallest.
- They all have different mask lengths, in order from longest to shortest: Raphael, Donatello, Leonardo, and Michelangelo.
- The turtles all have distinct eye colors. Raphael has green, Donatello has red/brown, and Michelangelo and Leonardo have blue eyes, though Mikey's are a lighter blue.
- On another note, they all have pupils except when they become serious in some segments, to when they have white, empty eyes.
- Each turtle's head is distinctly shaped.
- All the Turtles have their own skateboard, which was shown in a trailer.
- The Turtles are 15 years old in this series, though it is obvious Leonardo is the oldest, with Raphael and Donatello in the middle and Michelangelo being the youngest.
- They have three toes on each foot instead of two as in previous incarnations.
- They don't have visible tails unlike in some previous incarnations.
- They have different color wraps on their feet and wrists with Leonardo having light peach, Donatello having golden brown, Michelangelo having light brown, and Raphael having dark brown.
- Leonardo's favorite television series, Space Heroes, has similar art and story to the Filmation Star Trek animated series. However, it was replaced in the second season by SRMFF.
- The romantic element of the story is more emphasized in this series, where Donatello develops a crush on April, Leonardo develops feelings for Karai, and Michelangelo forges a bromance with Leatherhead.
- This is the second incarnation of Shredder to be voiced by an African-American actor. James Avery was the villain for most of the 1987 series' run. This Shredder is played by Kevin Michael Richardson.
- The show tends to shift into 3 different styles, mainly the mouth movement.
- The show's opening ends with the turtles in the same poses as the original turtles on the cover of the first mirage comic book.
- In the 1987 series and the 2003 series a young boy purchased the Ninja Turtles, but in this version, it's Hamato Yoshi who bought them.
- This is the first TMNT series that uses anime style expressions.
- Except for the IDW comics, this new series uses elements from all incarnations of TMNT.
- This is the 2nd TV series to show the Ninja Turtles as kids.
- ↑ Matt Edwards (2012-07-30). New Teenage Mutant Ninja Turtles theme song. Den of Geek. Retrieved on March 26, 2013.
- ↑ All new Teenage Mutant Ninja Turtles series comes to Nickelodeon in October. Throng (2012-07-19). Retrieved on March 26, 2013.
- ↑ Bibel, Sara (October 2, 2012). Teenage Mutant Ninja Turtles' Renewed by Nickelodeon for Second Season; Premiere is Number 1 Kids Program on Basic Cable. TV by the Numbers. Retrieved on March 16, 2013.
- ↑ Goldman, Eric (October 2, 2012). Teenage Mutant Ninja Turtles Renewed for Season 2. IGN. Retrieved on February 26, 2013.
- ↑ Nicholson, Max (February 26, 2012). Nickelodeon Renews Ninja Turtles for Season 3. IGN. Retrieved on February 26, 2012.
- ↑ Rahman, Ray (September 26, 2012). 'Teenage Mutant Ninja Turtles' producer: How 'booyakasha' became the new 'cowabunga'. Entertainment Weekly. Retrieved on March 12, 2012.
- ↑ Castro, Manny (October 21, 2009). Viacom Buys The Ninja Turtles!. NowPublic. Retrieved on February 26, 2012.
- ↑ Nickelodeon Acquires Global Rights to Teenage Mutant Ninja Turtles. Reuters (October 21, 2009). Retrieved on February 26, 2012.
- ↑ Nick's new TMNT cartoon; preview art revealed. The Allspark (March 7, 2011). Retrieved on March 20, 2013.