The thing about the Doctor and guns, is that his hate for them tends to vary from incarnation to incarnation (or showrunner to showrunner!) - plus, if you're an old Who fan, like me, you tend to take it more in your stride because - Hello? - River is not the first crack shot in the TARDIS (that would be Sara Jane) or the first companion who uses violence to achieve a result (Ace and her nitro!)

Previously, the Doctor was someone who disapproved of violence as a first resort, but didn't exactly take it off the table either...