A Witch's Tail (1)

The sisters try to help a mermaid who made a pact with an evil water demon known as the Sea Haig, and now regrets her choice. Meanwhile, Cole wants Phoebe back, Phoebe wants a divorce, Piper wants to protect her and Leo's unborn baby, and Paige just wants to balance her new job as a social worker with her position as a Charmed One.