The Den of Geek The Weekly Quiz (12 original questions about movies and TV, every Wednesday at 07:00 ET, 12:00 BST, a bit of fun) is pleased to welcome guest quizmaster Chris Farnell. Take it, Chris.

I have come from the future to give you a warning. A warning that will soon The ultimate science fiction
Film Quiz Book will be available for purchase. It will contain over 1,000 questions about science fiction films
covers everything from alien planets to time travel to killer robots, and if you buy it, you will
have fun!

Unless, of course, that commercial was too strong and inadvertently dissuaded you from buying,
and causes a time paradox of cataclysmic proportions… Ah.

Answer these 12 time travel quiz questions while I look for a solution
that doesn’t mean you kill your own grandfather.