Sometime back I know I saw the episode last night of Murder on the Home Front however, I am remembering it being part of a 3 episode series and this was the final story in that series but I do not recall the series being called Murder on the Home Front - the part underground reminded me also of the Bletchley Girls find a victim and later get there just in time to save another.
Between the Murder on the Home Front and Indian Summers Sunday night PBS has become uncomfortable to watch - I wonder why we see the servants in Downton as noble and admirable where as the Brits took that same system with them to India with the seeable difference, the servants are not coming up through the ranks starting many of them as poor country folks. Where as, in India it is Indians who carry out the same job and we, observing their work in film, as the Indians at the time, look down upon and do not consider the Indian servants as maintaining similar noble and admirable qualities as we do those who served in Britian.