1 {scene: In the sewers under the Russian consulate in Istanbul}
1 Kerim Bey: A present from your navy. Our friends were turned out while the Public Works Ministry conducted a survey.
2 Kerim Bey: The story was that the heavy traffic was shaking the foundations. By the time the place was declared safe, I had this installed.
3 Stud: Don't the Russians notice a periscope sticking up out of their floor?
4 Kerim Bey: We disguised it with seaweed.

I always worried about this point in the movie. Quite evidently there's the top of a periscope sticking up somewhere where it has a decent view of the room inside the Russian consulate. Yet nobody seems to have ever noticed it. I presume it must be hidden inside a mousehole or something, but you'd think that regular cleaning and maintenance would notice and repair a mousehole.

So I dunno. I guess the Russians are just careless.