"Witchfinder General" it's not

For this edition of 50 Things..., we go to the seventeenth century for a Doctor Who tale which, despite featuring plague, invasion and the Great Fire of London, we found actually rather boring. But never mind, because once again we've done our research and discovered many interesting facts, which we can bring you in 30 Stupid Things About "The Visitation" (and 20 Cool Ones).