Do you remember the movie Galaxy Quest? If not, its basic premise is that the cast of a once-popular sci-fi show is contacted by an alien race who believed the show to be a historical document, not fiction. They transport the cast to their ship, replicated from the show, and ask for help defeating an alien warlord. Knowing nothing about how the ship works, they instead contact one of the show’s super-fans. He not only knows the entire layout, but just about every detail about the show, period. Triumph ensues.
When it comes to Doctor Who, I’m on the verge of becoming that super-fan, squirreling away knowledge about the show. Just in case.