Hercule Poirot, Agatha Christie's Belgian detective, is probably one of the most famous in literature.
Though retired from the Brussels police, wickedness seemed to sniff him out. Murders, like moths to a flame, found themselves drawn to his uncanny ability to see through deception.
With a mind that hummed like a perfectly tuned pocket watch, Poirot meticulously gathered details, the most trivial ones often proving to be the key. He'd convene dramatic gatherings, where, with a flourish, he'd unveil the truth, leaving even the most cunning criminal exposed under the bright light of his "little grey cells."