Teenage Mutant Ninja Turtles (2003): Season 5, Episode 4

5 - 4: More Worlds Than One

The Turtles and company continue their training under the Ninja Tribunal, learning to fight in the physical as well as mental and spiritual worlds. They're going to need that knowledge, because the second artefact of the Shredder has been found, guarded by a horde of nasty Tengu demons that eat Acolytes for breakfast… literally!