Chief Inspector Sullivan pays Father Brown a visit to warn him that Hercule Flambeau is on the run and wanted for a series of brutal murders.

December 1925. When Tommy receives a mysterious letter on Christmas Eve, he realises that the Shelbys are in danger of annihilation.

Albert Einstein settles into life in America, but dangers abroad continue to be a threat to both him and his former colleagues.

Albert Einstein and Mileva juggle raising a kids with his attempts to catch the eye of the scientific establishment.