The N numbers change on the Pan Am plane. Firstly on the ground it is N761PA then in air it becomes N707PA and then N722PA. Later another Pan Am plane is seen in the air as N707PA becomes N404PA on the ground.
Dirt roads don't cause tires to screech as is heard during the opening chase scene.
A mainland Chinese company called Ming Imports is shown operating openly in the U.S. in 1966, six years before the U.S. had diplomatic or trade relations with mainland China.
Both the Zenith Space Command and General Electric "videophone" TV sets show color pictures, but both are black-and-white sets.
Justin Power lands by helicopter on top of a Los Angeles skyscraper and proceeds to go to various offices and corridors in that building. When he finally exits, it is from what appears to be a two-story building, apparently an art gallery.
The convertible at the beginning has California plates.
Top right of picture just after Justin Power first introduces himself to the three "receptionists."