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The Red Signal is a short story, written by Agatha Christie. The red signal of danger looms over a dinner party. A close look at madness, psychology and supernatural premonition, just a few of Agatha Christie’s favorite themes. The story was first published in book form in the UK by Oldhams Press in The Hound of Death, 1933, available only by collecting coupons from a magazine entitled The Passing Show.