Complex sentence: Part 1 first aired in the United States on November 11 and part two aired on November 18,2001 on FOX in the United States and Canada, both episodes subsequently aired in the United Kingdom and Ireland.
Split into simpler sentences: Part 1 first aired in the United States on November 11 and Part 2 aired on November 18,2001 on FOX in the United States and Canada. Both episodes subsequently aired in the United Kingdom and Ireland.