Sonic X: Countdown To Chaos is the sixth volume of the Sonic X DVD series released in America. It contains five episodes of the series.
Eggman thinks Chris and friends found another Emerald. He unleashes E-66 upon our heroes, which sets off an environmental disaster.
Chris has an unhappy birthday when his gift, the sixth Chaos Emerald, is swiped by Eggman.
Chris and Chuck must figure out what is keeping Sonic's legs running at all times before he runs himself ragged.
Knuckles calls a truce with Eggman and convinces Chris to give up all their Chaos Emeralds. Will Eggman live up to his end of the bargain?
A mysterious island appears when the seventh emerald drops into the water along with Eggman's emeralds.