What chemical element has been added to table salt since 1924, to help prevent goiter?

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Which character in Greek mythology had many heads

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Emollients are more commonly referred to as what?

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Who plays the guitar introduction to Michael Jackson's hit "Black or White"?

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Who has been played in a movie by both Willem Defoe and James Caviezel?

What was David Dunn's weakness in the movie "Unbreakable"?

Which character did Stephen Boyd play in the 1966 Science fiction film "Fantastic Voyage"?

What do the prisoners call the escape tunnels in the film "The Great Escape"?

Where is the only royal palace in the United States?