A very interesting film if you can lay your hands on a copy is
Mitchells do fly IMC. It tells the story of how Englishman, pilot/adventurer John Jeff Hawke sources from all over the USA and arranges to fly six B-25 Mitchell bombers to the UK for the filming of
Hannover Street with minimal instruments and only one working radio between them!
Taster here
https://youtu.be/52eUHn6HazISadly the intrepid Hawke dissapeared some years later having hired a Piper Aztec in southern France during the conflicts in the former Yugoslavia. The remains of his plane were later trawled up by an Italian fisherman in the waters to the north.
There are old pilots and bold pilots but not many old bold pilots.