Comics Alliance has posted a preview clip of the upcoming episode to Nickelodeon’s Teenage Mutant Ninja Turtles entitled Trans-Dimensional Turtles, which will air on Sunday, March 27 at 11am (EST/PST). It will feature the turtles of the present series teaming up with the turtles from the original 1987 series.

As being reported by Comics Alliance, the episode brings back the 1980s series’ original voice actors Cam Clarke (Leonardo), Barry Gordon (Donatello), and Townsend Coleman (Michelangelo) alongside Rob Paulsen (who voiced Raphael in the 1980s series and Donatello in the current series).

The Turtles from the 1980s series previously made a speaking cameo appearance in the current series’ second season in the episode Wormquake!