In the now-famous scene from the opening credits, Jack Lord is shown from a helicopter shot on a balcony atop the Ilikai Hotel, then turns to the interior of the suite. The scene cuts to an interior shot making it appear that he turns directly from the balcony to face the camera after the cut. Actually, based on the scenery behind him, the interior shot had to have been made in a suite on the opposite side of the hotel.
In the opening title sequence, a hand loads a .38 snub nosed revolver, then spins the cartridge. The gun is loaded with bullets that have already been fired. The depression where the firing pin strikes the cartridge is clearly visible on all of the shells loaded.