anniversary special, "The Day of the Doctor" (2013), another version was seen in the hands of John Hurt's War Doctor. The design was similar to the one used by Tom Baker's Fourth Doctor. This time the halo and bullet tip had been removed, replaced by a red light as well as a large red dial added to the base. Character Options released a version of this sonic screwdriver on 23 November 2013 at London's ExCel labelling it "The Other Doctor's Sonic". It was established as a plot point in that episode that the sonic screwdrivers employed by various Doctor incarnations all use the same software, something the War Doctor exploited by running a calculation over a course of several centuries with the Tenth and Eleventh Doctors seeing the calculation completed through their models. It is also directly implied after the fact that the sonic screwdriver has actually been a part of every doctor's retinue, despite its disappearance for doctors six & seven; the Tenth Doctor says to the Gallifreyan high command, as all thirteen doctors are about to change history by saving the planet, that the calculations for doing what's about to be done have been "running all my lives." In addition, when combined, the screwdrivers of the War, Tenth, and Eleventh Doctor could create a sonic force field blast to repel and destroy a Dalek. "The Magician's Apprentice" (2015) shows that the sonic screwdriver can create "an acoustic corridor" so that the Twelfth Doctor can communicate with a boy trapped in an extraterrestrial mine field. However, when the Doctor discovers that the boy is actually a young Davros, he abandons the boy, leaving the screwdriver behind, though it is revealed that he did save young Davros after all. Davros is shown to have kept the screwdriver in his possession ever since, and the Doctor tells Clara that he no longer has a screwdriver. By that time, the screwdriver had been withered and damaged by time and was seemingly useless. Sonic sunglasses In his first appearance at the beginning of series nine of Doctor Who, the Doctor is seen wearing black Ray-Ban sunglasses ("The Magician's Apprentice"), and he says that he no longer has his sonic screwdriver. Later, in "The Witch's Familiar", he unveils that the sunglasses are actually a wearable version of the screwdriver, claiming that he is "over" screwdrivers: "They spoil the line of your jacket." The glasses