In the climactic desert chase scene our dune-buggy-driving heroes are pursuing three villains in a Jeep. The villain riding in the back of the Jeep is thrown from the vehicle, but in the next shot is he is back on the Jeep holding onto the roll bar.
After Hack and Zack meet Kitty and the waiter and Starsky says him something about the tie, the boom mic is visible on the top.