BBC has released a new official teaser for the upcoming new season of Doctor Who premiering August 23rd at 8PM EST in the U.S. What is interesting is a particular question that Peter Capaldi as the Doctor is asking presumably Clara Oswald..."Tell me, am I a good man?". Clara seems to declare she "Doesn't know who the Doctor is anymore". What is the implications being asked by the Doctor? Are we looking at a darker, grittier season of Doctor Who with an older regeneration of the Time Lord? Watch the trailer and come to your own conclusions.