'Doctor Who' trailer offers first look at Maisie Williams' character

The newest trailer for Season 9 of BBC America's "Doctor Who" offers the best look yet at "Game of Thrones" star Maisie Williams, who is guest starring as a mysterious character opposite Peter Capaldi's time-traveling adventurer.

The series will return on BBC in the U.K. and BBC America in the U.S. on September 19.

Jenna Coleman is reprising her role as the Doctor's current companion, Clara, and the trailer also features glimpses of Michelle Gomez as a new version of The Master.

The first season of "Doctor Who" with Capaldi in the title role wound up being the highest-rated season of the series on BBC America. Overall, the season averaged 2.035 million viewers in Live + 3 Day ratings.

The new season will also feature appearances by Tom Stourton, Ariyon Bakare, Simon Lipkin, Ian Conningham, Murray McArthur, Barnaby Kay, John Voce, and Struan Rodger.

More to come...

Read original story 'Doctor Who' Trailer Offers First Look at Maisie Williams' Character (Video) At TheWrap

See photos of the "Doctor" throughout the shows 50 year run: