And again, I look at much of this in context of what we've seen earlier throughout the entire series, at least with regard to Foyle and Sam. Throughout the WW2 years, they'd been in a similar area in terms of right and wrong. (I remember the scene in "The White Feather" when Milner mentioned that Nazi sympathizer Guy Spencer had "some interesting ideas" and Sam gave Foyle a look that indicated concern with Milner's statement.)
Sam actually starts diverging from her former and future boss in Series 7, when she's trying to help Adam with the boarding house. Priorities are already going in different directions for our 2 favorite characters. Thus, by Series 8, now a wife and soon-to-be mother, she can never again be quite the carefree in-for-all assistant to Foyle that she's been in the past.
Hope that made sense.
