Cadfael: The Virgin in the Ice

The 12th-century sleuth sets out to clear his novice Oswin of murdering a nun whose body has been found frozen in a block of ice. While tracking down the culprit, he is also forced to confront the fact he fathered a son before he took holy orders. Medieval mystery based on the novels of Ellis Peters, starring Derek Jacobi, Mark Charnock, Eoin McCarthy and Julian Firth