The clip features both the dreaded Daleks and actor Sacha Dhawan’s The Master.

“This is the day you are erased forever!”

The BBC has also released a new synopsis for the episode,The Radio Timesreports.

Doctor Who

Jodie Whittaker in ‘Doctor Who: Legend of the Sea Devils’.James Pardon/BBC Studios/BBC America

“Who is attacking a speeding bullet train on the edges of a distant galaxy?

Why are seismologists going missing from 21st-century Earth?

Who is defacing some of history’s most iconic paintings?

Why is a Dalek trying to make contact with the Doctor?

And just what hold does the mesmeric Rasputin have over Tsar Nicholas in 1916 Russia?

The Doctor faces multiple threats… and a battle to the death.”

News broke in Maythat Whittaker will be replaced in the role of the Doctor bySex EducationactorNcuti Gatwa.

“The future is here and it’s Ncuti!”

the series' new showrunner, Russell T Davies, said in a statement.

Ncuti dazzled us, seized hold of the Doctor, and owned those TARDIS keys in seconds."

It feels like you’re giving yourself stitches like, ‘Why have you done it?‘But…

it felt right."

Watch the trailer for “The Power of the Doctor” below.