The ludicrous interrogrations in Foyle's War

I can't quite understand the fuss over Foyle's War, a series of British 90-minute teleplays that seems to have a pretty devoted following - to me, they're not much more than very conventional Agatha Christie-like crime/murder mysteries, with the added fillip that they're set in provincial England (somewhere near the south coast) during WWII. I think what could be appealing, if I were to watch the whole series, is that it covers the scope of the whole war, from about 1940 to 1945, and we see an unusual perspective on what life was like in rural England during the wartime - the first two episodes nicely convey the real tension Englanders felt in 1940 when a German invasion, and perhaps even victory, seems possible or probable - at least in the U.S. we know little about that phase of the war. The war background to the second episode in the series is the evacuation, much by fisherman and other nonmilitary craft and pesonnel, of British forces overwhelmed and stranded at Dunkirk - material that Ian MacEwan brilliantly conveyed in Atonement. So there are some potential strengths to Foyle's War, but the first two episode move at a glacial pace and, worse, they fall prey to the flaws of second-rate mysteries: the clues fall far too easily into the hands of the investigators, complicated interrogations take about 90 seconds (How dare you ask me that! Well, as long as you've asked, I'll tell you everything), the conclusion involves extensive exposition by Detective Foyle, and at the end the crime that he's solved is entirely preposterous. For example, in the second episode (they're not really episodes so much as a series of mysteries involving the same three investigators - their interrelations are touched on but not developed much, at least yet): a group of right-wing pro-German fanatics gather at a country inn for a meeting, power goes out, in the darkness a woman is shot to death. Who dunnit? Suspicion falls on several: her son and her husband both feel oppressed by her, an estranged boyfriend of one of the staff was lurking outside, one guest mysteriously left the room just before the blackout, another hotel guest (not at the meeting) was known to er carrying a pistol. The clues all fall into place, of course, and at the end, you think: if you had to kill her, why would you do it in a room with about 20 potential witnesses? Among other things. Anyway, if you live this type of mystery, Foyle's War is OK, and its view of life in wartime is kind of interesting, although is there any time and place in history subject to more books and movies that England during the war years? Can't we move on?