I'll bet no one connected with this Poverty Row masterpiece had read Jean-Paul Sartre's No Exit (produced a year earlier), but in Detour no-budget auteur Edgar G. Ulmer proved that Hell truly is other people if the person is Vera. Picked up on a trip out west by a man (Tom Neal) fleeing from a death scene, she instantly and spectacularly gets on his and the audience's nerves. When she's not playing the domestic harridan ("Stop makin' noises like a husband"), she's threatening to send him to the gas chamber ("sniffin' that perfume Arizona hands out free to murderers"). With a final fatal phone call, Vera leads her poor prey to his motel-room doom. Even in death, she makes the survivor the sucker.
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That's why good actors turn into them in summer. Take a look at the best villains throughout movie history