He might have left his old career behind to become a maths teacher, but Danny Pink has certainly retained some of his military skills, as demonstrated when he took on the Skovoz Blitzer. The Doctor and Clara needed a distraction and Danny provided it, back flipping over the alien to turn it's focus away from his girlfriend and save the day in the process. At this point in Doctor Who there is no question that Clara is a hero, willing to take necessary risks to save the day. In jumping into the fray Danny proved himself too. As the series continues, Danny's former military skills might come in very useful - should he ever actually make it onto the TARDIS (one covert invisible watch mission aside). The Doctor couldn't deny that Danny was the hero this time. Unfortunately, he's got some issues to work through first. Which takes us on to our next point...