Revealing mistake: When Alfie (Michael Caine) goes to the dry-cleaners, he starts kissing a woman. He has a grey suit on and he comes out wearing a blue suit, being a comedic trick. But, when the guy in the grey suit goes behind the clothes rail, you can tell it is not Michael Caine, as his hair is shorter and blonder than Caine's.
Revealing mistake: After Luther faints from seeing the shears in the painting of Mrs. Simmons, the beam of light from his flashlight continues to move side to side, but Luther's flashlight is in his hand, unmoving.
Revealing mistake: When the US Navy engages the enemy at the blockade on the Yangtze River, during combat scenes, a sailor's (prop) bayonet wiggles on board the San Pablo.
Revealing mistake: When George and the young man are in the garden, telling jokes and drinking bourbon, the young man pours some bourbon into George's glass, but the bourbon, instead of being brown, is clear, like water.