Santa Fe, 1957. Three villains apparently discussing their nefarious plans for world domination, or the disposal of that pesky Mister Bond, on board a comfortable, fun Santa fe train... probably at affordable prices, too.
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Wow! Get a load of them eyebrows! The two guys look like they're hoping to get her alone for some wicked doings, but she looks downright carnivorous herself. The standing man looks like he's dropping something into the drink of the seated man. All the while, the lady is staring at the chest of the pill-dropping man, where she knows that mere inches away, beats his juicy, delicious heart. I find it hard to have any sympathy for whatever happens to these three in the next few hours.
Why so heavy with the big scratchy eyebrows? Even setting aside the loose and inky style of the drawing, you don't have to draw such heavy eyebrows, or point them down in the middle so much. Jeez! You want the people to be likable, not killable.
Here, let me help...
See? not so hard.
Of course, you could also go the other way and make them even more sinister...