While filming at London's Park Lane Hotel, about 30 extras had to be used on short notice when the production team noticed red double-decker buses passing by frequently. That's common in London, but not New York, where the scene is set. The extras were used outside the hotel, to block the buses.
The company filmed at Dunvegan Castle on the Isle of Skye for five days. Dunvegan Castle is said to be the oldest inhabited castle in northern Scotland. It has been occupied continuously by the chiefs of MacLeod for over seven centuries, and it is still the MacLeod ancestral home. Though there are only at most 12,000 people on Skye at any one time, the film production rolled in with a crew of 250, a cast of 25, and 300 extras.