Doctor Who 'Secret' Trailer Released

The BBC has released a ‘secret’ trailer for the first episode of the upcoming Doctor Who series, entitled Deep Breath.

Posting a message on Twitter, fans have been encouraged to find and share the footage - which includes a dinosaur and a revamped Tardis - using #DoctorWho.

The eighth series kicks off on Saturday 23 August, and is the first to feature new Timelord Peter Capaldi, although companion Clara - played by Jenna Coleman - returns.

The cast of the show are currently on a world tour to promote the new series. Having already hit Cardiff, London and South Korea, they’ll be off to Sydney, New York City, Mexico City and Rio de Janeiro before the premiere is aired on UK and US TV.