Well, for one thing, you all appear to be of different nationalities.
6 seconds sound clip from the Beat the Devil (1953) movie soundboard.
You can hear this line at 00:08:51 in the Blu-ray version of the movie.
Quote context
[...]
- How do you do? My name's Dannreuther. How do you do?
- Are your friends sailing too?
- You're a very mysterious group I must say.
- Well, for one thing, you all appear to be of different nationalities.
- It's your move, Gwendolen. (2)
- Check.
- I have a theory about you and your friends.
- As a matter of fact, I think you're doctors. Evil ones, I mean.
[...]