During Doctor Who's stop-off at the San Diego Comic-Con, the audience was treated to a brand new trailer for season 9 of BBC's long-running series, Comicbook reports. Now, the preview has already made its way to the web and fans worldwide can now catch up with the extraterrestrial Time Lord.

As Fansided mentioned, the fast-moving trailer glimpsed a host of crazy, new worlds and all sorts of terrifying creatures. Fans also caught sight of the doctor in kickass rock star mode and there was a lot of running too. The footage was an exciting overview to the new adventures of the cult-favorite doctor.

[Check out the trailer below] The end of the clip ought to send Westeros and TARDIS fans in an uproar as they got their first look at Maisie Williams, who, as Deadline reports, was tapped to play an undisclosed guest-starring role for "Doctor Who" season 9.

The "Game of Thrones" star made quite an impression on Doctor Who, who raised his eyebrows in reply to the character's starkness after calling him "old man." Unfortunately, there's still no official word on what character Williams will play in the science-fiction series.

The Guardian writes that this year's Comic-Con will be Peter Capaldi's debut, who plays the Time Lord himself. With him is executive producer Steven Moffat, Jenna Coleman, who plays companion Clara Oswald, and Michelle Gomez, who plays Missy, the female version of the doctor's nemesis, Master.

"I've never been in front of 7,000 people before in my life," Capaldi quipped as quoted by Deadline. "It's the only show that's in my bones. It's the only show I've ever been in that I really knew and loved," he went on to say.

During their San Diego Comic-Con conference, which had the entire Hall H filled with onlookers and excited fans, Moffat commented as to how writing is for the distinct doctors, which come and go in the well-loved series.

"The difference in how you write the Doctor isn't that great. It's what the actor's bring to it and you start writing toward it," Moffat said as quoted by Fan-sided. "On paper, each of the Doctors are surprisingly similar," he said as per Fansided.

When asked about the possibility of a female Doctor coming to the fore, according to Deadline, Moffat didn't promise anything and simply answered that "there's no vacancy."

"Well, I think my opinion is fairly obvious from the show, isn't it? What I think about the possibility, and whether it would work or not? I think I've expressed myself about as clearly as I could, in the context of the show," the executive producer explained as quoted by Vulture.

"Doctor Who" season 9 premieres September 19.