In a new episode of Nickelodeon’s “Teenage Mutant Ninja Turtles,” the Turtles will head back in time to meet their 1980’s alternate-reality counterparts.

“Trans-Dimensional Turtles” will feature the original voice cast of the 1980’s Turtles and Krang. The episode will kick off with the present Turtles meeting their ‘80s counterparts in a 2D-animated world. Afterward, the clan will move back into a CG-animated dimension to defeat both the ‘80s Krang and Kraang Sub-Prime.

In addition to the special episode, “TMNT” fans can go to Nick.com on March 21 for a new game, “Teenage Mutant Ninja Turtles: Kickin’ It Old School,” set in the ‘80s Turtle environment.

The “Trans-Dimensional Turtles” episode will debut March 27 at 11a.m. (ET/PT) on Nickelodeon.