Italian Secret Service
Small bike with two-stroke sound. No other view in the movie. I first thought of a Velocette LE because it was a widely used police motorcycle, but they usually didn't have a large fairing like that. So my next guess is a Triumph 3TA Police. This is a Velocette "silent" LE - the giveaway is the shape of the rear plate and the distinctive paniers. The front fairing was quite common on British police models.