When the car pulls up to the airplane, the long shot shows that Brastow's window is open but in the close-up the window is closed.
In the chase scene down the hill the car following Mannix changes colors. It goes from green to white, back to green, back to white, and one final time back to green.
During the opening sequence, the cases of Scotch whisky read "Nett Wt." which should be "Net Wt.". The misspelling would certainly draw unwanted attention to these smuggling containers.
At the beginning of the episode, Harris and Brastow are shown on what is supposed to be a New York dock, but they are driving a vehicle with California plates.
Around midpoint: When Mannix pulls up and gets out of the car to meet the Coltons, two photographers holding camera are reflected on the front fender around the orange side marker.