There are lots of very cool moments for fans of Doctor Who in this first trailer for series 9, including the return of Michelle Gomez as Missy (a.k.a. The Master) and both The Doctor and Clara squaring off against an entire city of Daleks! There are plenty of other interesting reveals and teases too, so be sure to check it out below to see how many you can spot. It was also announced at the show's Hall H panel at the San Diego Comic-Con that Doctor Who will return on September 19th.