When Mr. Leslie is examining the First Lady's Office in the White House, he reads off the names of the portraits of former First Ladies on the wall. One of them is "Mrs. Andrew Jackson." Actually, Jackson's only wife, Rachel Donelson Jackson, died in December 1828, after the Presidential election that elected her husband to his first term, but before he was officially inaugurated as President, so she never had the title of First Lady. Instead, Emily Donelson, a niece of President Jackson, served as his social hostess while Jackson was in the White House.
Polly Bergen was born in 1930 and would only have been aged thirty-three or thirty-four years old when this film was released. The minimum age for the United States President is set by the Constitution as thirty-five. However, her character's age is never mentioned nor indicated throughout the film, it can be assumed she is younger than her character's age.
As Fred McMurray is mentioning the former First Ladies he mentions Rachel Jackson who was not actually First Ladies because Andrew had not been inaugurated yet.
During the car and train chase scene where Valdez (Wallach) is driving Thad McClound (MacMurray) along a remote 2 lane road showing off the speed of Valdez's sports car, a police cruiser or crew auto, can be seen blocking between the road and a railroad crossing so that no cross traffic can pass into the train's path.
Microphone shadow on floor when kids enter Fred MacMurray's bedroom.
Mic visible in center top of frame 3 seconds after start of President's dialog in Presidential yacht stateroom.
Visible in first shot set in waiting room outside President's office.
In the President's bedroom, after a brief romantic encounter is interrupted by a phone call, a moving boom mic shadow is visible on the canopy bed as husband Thad McCloud (MacMurray) exits.
During their confrontation at the end of the movie when McCloud reveals the secret dealings in Senator Walsh's life, the Senator incorrectly calls it "libel" (a false written statement) instead of the correct "slander" (a false oral statement). The Senator is a lawyer who should know the difference between the two.