Factual error: Churchill tells his aide to fetch "Air Vice-Marshal Dowding". Dowding was actually an Air Chief Marshal, two ranks higher, and wears the correct rank insignia for that rank when he is seen later. As a keen military man, this is not an error Churchill is likely to have made.
Winds of War (1983)
1 factual error in Cataclysm
Starring: Robert Mitchum, Jan-Michael Vincent, John Houseman, Ali MacGraw
Continuity mistake: Part 3: Hitler enters the study and stands near the door with his hands clasped behind his back. The angle reverses, and his hands move instantly to his sides. Reverse again, and he's returned to his original stance. (00:20:00)
Trivia: Herman Wouk, the author of the source novel, has a cameo as the Archbishop of Siena.