Samurai Jack: Fighting Blind

Jack's quest leads him to a race of mole people who live underground, undetected by Aku. The mole people possess special jewels that make them invisible -- and that gives Jack an idea. If he can fight Aku while invisible, he may finally able to defeat the all-powerful demon. The only problem is the jewels eventually make their wearers go blind. Is it worth the risk? And can Jack hone his samurai skills to fight his archenemy without his sight?