Continuity mistake: From the time the army first attempts to destroy the Martians until the movie's end, Sylvia wears the same blue dress. Despite sheltering in an army bunker, being in a plane crash, jumping into ditches, running through woods, escaping a demolished house, and evading a frantic mob, her hair remains perfectly coiffed and her dress stays clean and undamaged.
Continuity mistake: In the laboratory, the lenses of the Martian camera were tilted in the frame in the closeup, then righted in the wide shot.
Other mistake: When the Martians first land on earth, the ship is so hot, it starts fires in the surrounding area, and can't be approached for hours later. Yet later, when another ship crashes directly into the farmhouse, there are no fires, and the farmhouse certainly doesn't catch fire.
