Yu-Gi-Oh! GX Episode 28: Extracurricular Lesson is a Duel of Darkness!? Part 2
Episode 28 of 180 of Yu-Gi-Oh! GX, aired April 13, 2005, 25 minutes. Available with English subtitles and dub where released.
Episode summary
Jaden continues to battle in the duel of his life, finally winning his and his friend's freedom and just barely making it back to his world.