Before season 1 aired and we all became familiar with the TV show, there was an unreleased pilot episode. The unaired pilot was very different from what the actual first episode "Winter is Coming" turned out to be, with the most notable differences being in the cast. For example, instead of Emilia Clarke, young princess Daenerys was played by Tamzin Merchant. Also, author of the book series, George R. R. Martin was playing a Pentos nobleman with a giant hat! We'd pay good money to see that!