Pathdinders is a very good TV series from the 1970s which I found in my local library as a 12 part DVD. I'd never heard of the series before (I was only 5 years of age in 1972) yet it is surprising that this has never been re-shown on TV down the years. Incredible.
Sadly, the producers only seem to have had use of one Lancaster during filming as that's all you ever see. But the reconstuction of the pathfinding raids over Germany is first class. Of course, some episodes are totally unrealistic, like the one where three of the crew go on the run in Germany - it turns a little bit into a sort of Keystone Cops episode, with the Germans made out to be utterly stupid and naive.