Talk:North Star

5.3 Factual correction
Just watched this episode and it does NOT reference the North Star, but instead the Dog Star, Sirius, in the constellation Canis Major. The Doctor references that it is a binary star, and Captain Avery can be seen flying towards a binary star at the end of the episode. So, no North Star at all. Definitely the binary star Sirius (which is also sometimes used for navigation).