Complex sentence: It was decided that the pilot had to be re-shot and some cast changes and a different director--some major scenes were cut, for the example a flashback to the death of Eddard Stark's brother, and the death of John Arryn.
Split into simpler sentences: It was decided that the pilot had to be re-shot and some cast changes and a different director. Some major scenes were cut, for the example a flashback to the death of Eddard Stark's brother, and the death of John Arryn.