A breakdown to the brand new trailer released at San Diego comic con for the 2017 Christmas special, twice upon a time.
A clip of William Hartnell in the tenth planet-or is it David Bradley?
A colourised image of David Bradley in twice upon a time.
Polly returns to assist the regenerating David Bradley
ERROR: This was not the way how the first doctor regenerates in the tenth planet.
Peter Capaldi begins to regenerate inside of the TARDIS
The 1st and 12th doctors walk out of their TARDIS onto...
A world war 1 battleground. The Christmas truce perhaps?
A soldier aims a gun at his rival in the WW1 battleground.
Peter Capaldi stares ahead with wonder at this snowflake.
Mark Gatiss plays the colonel in the special.
The 1st and 12th doctors look ahead at the colonel.
David Bradley smiles in an unidentified backdrop.
The Colonel enters the 1st doctor's TARDIS.
The 1st and 12th doctors are shocked by an incoming explosion.
The 12th doctor aims his sonic screwdriver with the 1st doctor by his side.
David Bradley in once again another shot as the 1st doctor.
Peter Capaldi spots a way out in the same location as the last shot.
David Bradley and Peter Capaldi stare ahead.
Pearl Mackie stars for one last time as Bill Potts in the special.
Pearl has also announced in the San Diego comic con 2017 panel featuring Peter Capaldi, Pearl Mackie, Matt Lucas, Michelle Gomez, Steven Moffat and Mark Gatiss that she will NOT feature in series 11 and twice upon a time is the final appearance of Bill Potts.
The special will air on Monday 25th December 2017. See the teaser below:
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