Pirates of the Caribbean: On Stranger Tides' trailer: Mermaid attack! 'Pirates 5': Johnny Depp is keen on it. They've hired a writer. But is a fourth sequel ever a good idea? Johnny Depp says he ...

and the mermaid Syrena (Àstrid Bergès-Frisbey).The films started with their first release on the big screen in 2003 with Pirates of the Caribbean: The Curse of the Black Pearl. After the success ...