Notes from the Underground (story arc)

Notes from the Underground is a season 1 storyarc of the 2003-2009 animated TV series. It tells the story of the Ninja Turtles' going underground, discovering monsters.

Epsidoes

 * "Notes from the Underground, Part 1"
 * "Notes from the Underground, Part 2"
 * "Notes from the Underground, Part 3"