Imagine it’s 100 years in the future, and the invention of time travel has just been perfected. Not just sending a clock into orbit, or the irritating ‘well actually, if we all went to sleep for a really long time, we would technically be time travelling’, but proper Doctor Who style time travel: the ability to arrive at whatever time we wish, whenever we wish. What would we do with it? There are numerous possibilities, yet without the actual existence of time travel, it’s impossible to know how well thought-out they are, how useful they’d be to us or even how ethical any of them truly are. But we can still try to explore a few.