As Hicks is helped up during the first battle scenes, a bloody spear point is visible sticking out of his chest prior to him being struck by the spear.
The attack on Khartoum starts with an artillery shell completely destroying the top of a tower located in the city, yet later in the film a night shot displays the tower again intact.
Gordon has a friend in Khartoum executed for stealing grain. The man is killed by firing squad. In spite of being shot by a number of riflemen, his white clothing show absolutely no sign of injury.
When Gordon arrives in Khartoum and greeted by a crowd, he picks up a little girl and carries her by his right arm. At the end of his walk he is carrying the girl on his left arm.
Prime Minister Gladstone is shown in Parliament sitting on a red bench. The benches of the House of Commons have traditionally always been green.
Although Gordon and The Mahdi communicated by courier throughout the siege, they never actually met face-to-face.
We know the Mahdi died of typhus, even though the closing narration says we will never know his cause of death.
The Mahdi only wanted to kill soldiers, not the civilian population of Khartoum.
The cannon mounted on the steamer Abbas are shown being fired by the burning torch-to-touch-hole method. By the time of the events portrayed, they would have been fired by a friction fuse operated by pulling a lanyard.
In the first battle scene, when the Mahdist tribesmen supposedly have, according to Colonel Stewart's later report, 'scarcely a pistol to call their own', they have rifles, which they use.
When Kitchener's army is seen training near the pyramids on the wide screen print you can see two people strolling in modern dress on the sand dunes in the background.
Throughout the film, only Laurence Olivier pronounces "Mahdi" correctly, with a k-sound at the end of the first syllable. The British characters hear the name being correctly pronounced, but they continue to pronounce it incorrectly.