He's the world's most brilliant detective, but when Hercule Poirot agrees to investigate a trivial case it leads to something more sinister. Two back-to-back episodes of "Agatha Christie's Poirot" air tonight beginning at 8 p.m. | Georgia Public Broadcasting

He's the world's most brilliant detective, but when Hercule Poirot agrees to investigate a trivial case it leads to something more sinister. Two back-to-back episodes of "Agatha Christie's Poirot" air tonight beginning at 9:30 p.m. | Georgia Public Broadcasting