The Sum of All Fears (2002) - 6 major mistakes

Factual error: A force of Russian Tu-22 Backfire bombers attacks the aircraft carrier USS John C. Stennis (CVN-74)by sneaking in under the ship's radar. This is all well and good except that carriers usually don't use their own radar, they have Airborne Early Warning aircraft (E-2 Hawkeye's) that can see much further and not give away the carrier's position (let alone the F-14s which would be patrolling too). The whole point is, the US Navy practiced and planned for such a "carrier versus Backfire" battle for years. I guess in the interest of furthering the plot Hollywood has to ignore the immense measures the USN takes to protect those multi-billion dollar assets, not to mention the 5000+ sailors that man them.

Continuity: In the aircraft scenes after the blast in Baltimore, watch the clocks closely. The times go forward, backward, and everything in between.

Factual error: When Dressler's 'secretary' speaks 'German' it doesn't sound German or Austrian at all. In fact I am Austrian and If there weren't English subtitles I wouldn't have understood at all what he's talking about. Yes, there were German words, and maybe even the grammar was more or less correct but the pronunciation was that bad that the whole audience started laughing when they heard him talking in 'our' language.

Revealing: In the scene where Jack Ryan uses the radio after the helicopter crash, the film is reversed - the word frequency appears as a mirror image.

Factual error: In the scene where the dock worker receives the e-mail stating 'the day has arrived', the e-mail is dated Mon, 19 Nov 2002. However, November 19 2002 was a Tuesday.

Continuity: When Ryan is called from bedside to his first big meeting, he is wearing a severely rumpled blue oxford. When he leaves the meeting (with the borrowed tie and jacket) his blue oxford is pressed and starched.