later in the episode you see the German baddie flying a Heinkel III (stock footage) and the studio shot shows him in what looks like B-25 cockpit. Honestly the continuity with stock footage and studio scenes is shocking

Much like the numerous scenes in 70s detective dramas and suchlike of 747s taking off before switching to an under-fuse camera showing stock footage of a B52’s undercarriage being raised. Can’t think how many times I saw that particular segment.