Factual error: A secret file is password-protected on a computer, requiring a six-digit numerical access code. KITT states that the possibilities "are virtually unlimited." In truth, if each digit can be 0 through 9 (numerical meaning no letters or symbols), the possibility is 1 in 10^6, or 1 in a million. A supercomputer like KITT should have no problem running each number systematically until a correct code is found.
Factual error: Jeweler Albert Harrad calls Laura from his desk phone, but only punches six buttons before getting hold of her office. All U.S. phone numbers have seven digits: six wouldn't have connected him to anything. (00:37:30)