S02.E25 The New Atlantis

The Dark Hand releases Bai Tsu, a demon with dominion over the seas, from her demon portal in Rome, whereupon she discovers that her old kingdom is in ruins, she makes plans transform to San Francisco into her new kingdom. During this time, Valmont manages to knock out Shendu's spirit and calls upon the Chans for help to exorcise him from his body, in exchange for Bai Tsu's location. Although Valmont is true to his words, the Chans swiftly discover Bai Tsu is planning to trigger an earthquake to sink the city into the sea. While they are forced to prevent this, they are unable to help Valmont before Shendu recovers.