This episode is set in 1954, as shown by the date on the painting. However Father Brown is seen aiding Sam in a first world war trench, which was in the time span 1914 -1918, meaning at least thirty six years previous to this episode. That means both Father Brown and Sam would be thirty six years older than that incident meaning both would be in their late fifties. Sort your timelines out chaps. Overall an interesting episode, Nice to see Inspector Valentine back replacing the ghastly previous inspector. Lady Devine looks like a painted puppet, please tone down the violent make-up, she would look much better!