Catherine (Elle Fanning) and Aunt Elizabeth (Belinda Bromilow) visit the Russian front to lift the spirits of the army, but finding horror and devastation, Catherine becomes motivated to end the war. Grigor’s (Gwilym Lee) tolerance for Peter (Nicholas Hoult) sleeping with his wife wanes, so he decides to take action. Peter’s taken ill and questions of his replacement emerge, but the idea of taking the throne makes Catherine nervous. Marial (Phoebe Fox) wants Catherine to take a quicker and more direct path to the throne without needing a coup, while Archie (Adam Godley) attempts to make Ivan (Charlie Price) leader and rule through him – but the plan goes awry.
The Great: War and Vomit – Sunday 9pm on Channel 4