1. The Silence were originally Priests for naked people
2. French Doctors don't regenerate quite as often
3. Clara is a tribute to Elisabeth Sladen
4. Matt Smith wanted to be Doctor Watson not Doctor Who
5. Torchwood is an anagram of Doctor Who
6. Bow ties were almost not cool
7. Doctor Who employed the BBC's first female producer
story via (RaggedyFan.com)