Jim Phelps (Peter Graves) drops a small handwritten map of a restaurant as part of the plan to frame Joe Epic (Robert Goulet). One of the henchmen working for Mike Apollo (Dewey Martin) picks it up and looks at it. Even though just a minute or two passes before he shows the map to Apollo, the map changes (e.g., the color of ink goes from black to blue, the parallel lines on the left side become straighter, and the "R" in "Room" suddenly has a serif).
Vehicles involved in the action bear the license plates for "Holiday State", but parked cars and other cars driving have California plates.
In the opening scene, where the voice activated tape recorder is being found by the antagonists, it is unbelievably that a trained agent makes such a mistake, especially that it only takes to hide a small microphone in the room, the tape recorder may be well concealed somewhere away. Moreover, with this scene the Mission: Impossible series contradicts its own storytelling convention - every time such a prop is so clumsily hidden, it is because the protagonists want it to be discovered for the purpose of their scheme.
When Joe Epic talks to Barney (Disguised as the hotel's doorman),and asks if he had ever seen his late wife Leona, Barney calls her "Miss Davis." But at the sit-down meeting with the other mobsters Barney calls her "Miss Evans".