Young Winston (audio story)

 was the first story in The Churchill Years: Volume Two. It featured Madame Vastra.

Publisher's summary
London, 1899. After spending time in warzones abroad, Winston Churchill considers a Parliamentary career. But a memento from his visit to Cuba, four years earlier, returns to haunt him. Across the city, the Great Detective has a mysterious caller, all the way from Havana. As ruthless mercenaries wield alien powers, young Winston and Madame Vastra learn they have a mutual friend - an eccentric young man, sporting a bowtie...

Cast

 * Winston Churchill - Ian McNeice
 * Madame Vastra - Neve McIntosh

Continuity

 * Churchill visited Havana, Cuba in 1895. (PROSE: The Lost Diaries of Winston Spencer Churchill)
 * The Eleventh Doctor is described as wearing a purple frock coat. (TV: The Bells of Saint John)