The title song played over the end credits concludes with Sammy singing: "Next time I'm gonna get the girl, that's definite," a Bond-like hint of a sequel, which did occur with Die Pechvögel (1970).
All and all, Sammy Davis Jr. played four instruments during his musical numbers for this film ( double bass, trumpet, and drums for his first instrumental number and electric guitar for his second performance ).
Cartoonist from Mad Magazine and of several TV Guide covers Jack Davis did the illustration for the poster which can also be seen in the closing credits during the theme song.
The customized, yellow Secret Agent car that Charles Salt drives has a control panel on the dashboard with the letters B-N-O-J-S-X. These letters stand for the various secret agent things the car can do. Press the "O" button, and the car sprays OIL behind it, making the street so oily the pursuing car will spin out. Press the "S" button and the car will produce so much SMOKE, that it acts like a smoke-screen and the driver in the pursuing car can't see anything. And so on.
Charles Salt drives a Secret Agent car that has a control panel on the dashboard with the letters B-N-O-J-S-X. When he presses the "B" button, a BULLETPROOF shield pops up over the rear window of his car. When he presses the "N" button, a gun fires NAILS out the exhaust pipe, which will puncture the tires of the pursuing car.