He was evacuated from London in 1939, and recounted that experience in episode two of Thames Television’s seminal TV series, The World at War, first broadcast in 1973.
He reminisced his tricky experiences in Holland of both performing for the occupying Nazis and as a resistance supporter in the TV documentary series The World at War (Episode: Occupation: Holland 1940-1944).
In 1973 he made an appearance and was interviewed on the now famous British TV documentary series The World at War.
During 1971–74 he was historical advisor to the Thames Television series, The World at War, and completed several books on historical subjects.
Towards the very end of his life, he was interviewed in the now famous documentary series, The World at War.
The World at War, British television series documenting World War II
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He later gave his views on France's fall during interviews for the now famous production by Thames Television, The World at War.
One exception is a 1974 episode of the Thames Television documentary The World at War whose 10 minutes of coverage concludes 'thus ended one of the war's most tragic episodes'.
Darkness Descending, the second book in the World at War series by Harry Turtledove