How Doctor Who Ends Just one more question: is this world protected?Well, it was for a while. But familiarity breeds contempt and perhaps the Doctor spends too much time on Earth for our own good. Caldwell Tanner drew this cartoon illustrating the consequences. Comments (0) Commenting is closed. Click here to view up to the first 100 of this post's 0 comments We hope you like this article! Please help us grow by sharing: Tweet Get Updates In Your Inbox Free weekly emails, plus get access to subscriber-only prizes. We won't share your email. You can cancel at any time.