The Witch-king perceived that Wormtongue was evil and that he would harm Saruman. That is why he let Wormtongue go, instead of killing him. However, it probably didn't take a genius to see that ...

Now, the Witch-king of Angmar is a pretty mysterious figure in the source material, and his true identity is never revealed. What we do know about him, though, is that he's Lord of the Nazgûl and ...

Alan received the ultimate accolade for his work on the movies, when he won an Oscar for the third film, Return of the King. He remembers that night as though it were yesterday.