Jackie Chan Adventures (2000)

S2E25 The New Atlantis

The Dark Hand frees Bai Tza, the Water Demon, who sets her sights on her former realm, Atlantis. Discovering it in decay, she decides to flood San Francisco, using intel from Finn to aid her plans. Meanwhile, Valmont successfully knocks Shendu unconscious and turns to the Chans for assistance in exorcising him. However, with Uncle busy searching for a spell to counter the impending deluge, the Chans must confront Bai Tza alongside Valmont without his guidance.