Handcuffs and locked doors (minus the wooden ones) are a piece of cake for our acclaimed Time Lord. His magical wand - a flashlight topped with a coloured LED - can be calibrated to hundreds of settings, combust an entire Dalek fleet and infiltrate the most secure bank in the universe. A flick of the hand, some coordinated pointing and a little buzz here or there can incite a tempestuous explosion of cascading debris and twirling pepperpots, all erupting with a big sonic BOOM. And he didn't even need to say, "Expelliarmus"! Where would the Doctor be without his pocket-sized stick of deus ex machina? The phrase "Just sonic it!" or "Reverse the polarity!" can summarise a sizable chunk of his adventures. In Series 4's Partners in Crime, for instance, sonic battles occurred right and left and the piercing sounds of angry Whovians magnified the resulting seismic disruption. Thus, whenever enemies confiscate his beloved screwdriver (seriously, why don't they do that more often?), the Doctor is miffed and distraught, completely clueless and without a plan. That is, until Clara slaps him into action. But for all of its annoyingly frequent appearances (it really should be acknowledged in the opening credits), the Doctor's sonic screwdriver is a sleek, futuristic and iconic piece of technology. It never fails to complement badass monologues directed at a maelstrom of flailing monsters, all of whom succumb to the unanimously feared gadget and its supreme power. When Series 8 was aired last year, however, some Whovians couldn't help but ruminate on a single, niggling question: Why didnt Twelve get a new screwdriver?! Here are 5 arguments that elaborate on why he definitely should have. Prepare to be, erm... sonicked!?