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The dust is still settling from last weekend\u2019s action packed opener to Doctor Who: Flux<\/a>, but images and footage from the second chapter are already pouring in from the BBC.<\/p>\n Unlike previous seasons of modern Who, this 13th series will tell one continuing story across its six-episode run, which marks the beginning of the end for Jodie Whittaker\u2019s time in the TARDIS.<\/p>\n The second chapter is titled War of the Sontarans and sees The Doctor cross paths with Mary Seacole, considered by some to be the first nurse practitioner, as portrayed by Ghosts<\/a> and Unforgotten<\/a> star Sara Powell.<\/p> Seacole will join Team TARDIS as they are swept up in an epic battle waged by Sontaran forces who are attempting to add Earth to their growing empire, all of which unfolds against the backdrop of the Crimean War.<\/p>\n Watch the teaser below.<\/p>\n