Apart from some logical inconsistencies, this is a pretty good episode of "The Untouchables" and, as usual, Steve Cochran stars as a real dirt-bag.
When the show begins, the crazed hood, Kester (Cochran) is announcing to an unhappy man that he's going to be buying his Brandy*. However, the stuff is just crappy liquor stuck into counterfeit bottles. It's not the good stuff, de Bouverais, but his usual swill. Kester's plan (not a very logical one) is to destroy all the de Bouverais** in the city and then replace it with his crap. A bit later, the man responsible for the de Bourverais, the Marquis de Bouverais, visits America and Kester's plan is to force him to stop selling it to anyone in the States...and he plan on using the man's wife, the Marquise. How? Because before marrying this rich Frenchman, she was a stripper who worked for Kester...and he threatens to blow her cover.
As for Ness, he assumes when Kester is meeting with the Marquise it is because she is just cheap dame...once a cheap dame, always a cheap dame...as he knows of her past. But is she on the level? Could she actually be a decent woman? And, more importantly, can Ness count on her help?
As I already mentioned, this one is enjoyable because Cochran played such florid and nasty baddies on this show. The plot is also somewhat interesting, though it makes little sense at times.
*Although they call it Brandy throughout the episode, the crates say 'Cognac'--a very high quality version of Brandy from the Cognac region of France. It usually is more expensive and more prized than Brandy.
**The logic behind this really is screwy. Kester destroys cases and cases and cases of the stuff instead of stealing and selling it. He also then later says he needs SOME de Bouverais as a base for the swill he's making. Why not use the de Bouverais instead of destroying it?! It didn't seem like this was very well thought out by the writer.