Near the end of The Hunt for Red October, Jack Ryan...
...confronts the saboteur, a cook,...
...in the missile room. He says something in Russian, but there are no subtitles like earlier scenes.
What did he say?
Well, we know (and they did not subtitle it) because he immediately repeats it, in English (I got the order wrong, he says the English, then the Russian, thanks to TJL.
a goddamn cook!
Except that, no, we don't actually know that. I always assumed he was repeating/translating for the English-speaking movie audience. Here's what I found when trying to find citations/references to back up that mistaken assumption:
Looking at scripts - none of the original scripts have any reference to dialogue there. There are no words spoken. What is interesting in the scripts is that
the agent/cook is holding two wires, gleefully evil as he prepares to bring them together with, it is assumed, disastrous consequences.
Others have asked this question. On a couple of different message board threads on the Straight Dope website, users have supplied this answer, which fits with description of the actions the original script:
Where's what Baldwin says, in Russian -
"Ostav' eto v pokoye!"
Literal translation is "Leave it in peace!" the closest English translation is "Leave it alone!"
Or, in this case, essentially, "Drop it!"