Action adventure in space and time for all the family. In this feature length special to mark her last adventure, jodie whittaker's thirteenth doctor must fight for her very existence, against her deadliest enemies the daleks, the cybermen and her arch nemesis, the master.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.