Enemy of the State, Episode 5 of 'The Baron' (1966).
Set in an unnamed Eastern European country, Mannering and his assistant Cordelia are ostensibly guests at an art exhibition, but in reality are there to hand over a large sum of money to a British intelligence cell operating over there. It all goes wrong, Cordelia is imprisoned by the secret police, and Mannering has to come up with a cunning plan to release her. This he does by capturing the head of the local secret police (yeah, right!), and contriving an unlikely exchange deal.
Not bad, I'm fascinated by this sort of stuff based on the so-called 'Cold War' and depicted in shows like The Baron, The Saint, Callan, and so on, but how much of it had any kind of connection whatsoever with reality?

A tense scene between The Baron and Cordelia (played by Sue Lloyd), as she faces the prospect of several years in an East European prison.

This kind of thing is amusing and interesting in these ITC shows set behind the Iron Curtain. Is this a real language (I don't think so!), or some kind of made up stuff? Looks a bit Slavic, and the last word seems to hint at Croatia.
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I'm Doctor Strange