"Teenage Mutant Ninja Turtles" is heading back in time in an upcoming special episode of the Nickelodeon series, giving them the opportunity to meet their 1980s counterparts from the original animated series.

Of course, if you're going to go back to the '80s, why not bring back the cast of the original animated series to voice those roles? Cam Clarke (Leonardo), Barry Gordon (Donatello), Rob Paulsen (Raphael) and Townsend Coleman (Michaelangelo) all return to the characters they made famous, as the pizza-chowing party dudes from the '80s come face-to-face with the modern turtles. For what it's worth, Paulsen also voices Donatello on the current cartoon.

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The original "Turtles" cast has appeared on the modern series before though, so what makes this so special?

For the first time since 1996, Pat Fraley -- the original voice of Krang -- is also returning to his character. As the modern turtles are teaming up with their '80s counterparts, Kraang Sub-Prime (Gilbert Gottfried) will work with the original Krang in attempt to destroy the mutant ninjas.

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As you can see in the sneak peek clip from the episode, not only will the modern turtles be transferred to a 2D world, but the '80s turtles will make the jump to 3D during the episode. Nickelodeon also teases that the story will contain a tribute to the comic book versions of the Ninja Turtles, which were created by Kevin Eastman and Peter Laird.

The special episode, "Trans-Dimensional Turtles," premieres Sunday, March 27 at 11 a.m. ET/PT on Nickelodeon.

Posted by:Chris E. Hayner

Chris E. Hayner is equal parts nerd, crazy person and coffee. He watches too much TV, knows more about pro wrestling than you do and remembers every single show from the TGIF lineup. You may have seen him as a pro-shark protester in "Sharknado 3." His eventual memoir will be called "You're Wrong, Here's Why..." TV words to live by: "I'm a firm believer that sometimes it's right to do the wrong thing."