This episode was a very good premiere, starting off Charmed's new home on The WB- Sundays at 8pm. I remember this episode breaking record ratings for a Sunday and I thought it was great.
Paige's hair was OK in the episode but I still preferred it black.
Piper's storyline was interesting- she had to overcome her fears.
Phoebe was just in the center of attention, being a mermaid- I thought her mermaid costume was great.
LOL at Cole turning Darryl into that water thing. Haha.
Overall, the episode was exciting and interesting and a good start to an average season 5.