Following World War II, the esteemed detective Hercule Poirot (portrayed by Branagh) becomes disillusioned with the world and the people around him, and instead opts to retreat to the famously beautiful city of Venice.

Source: https://collider.com/a-haunting-in-venice-sneak-peek/

Hercule Poirot might have been the most famous character created by Agatha Christie, but it wasn't the only one, nor the only interesting and captivating detective.

Source: https://screenrant.com/british-murder-mysteries-must-watch/

Kenneth Branagh's third adaption of an Agatha Christie novel finds his detective character Hercule Poirot attending a seance in Venice, Italy, where (shocker!) a murder is afoot.

Source: https://www.buzzfeed.com/josephlongo/fall-movie-preview-2023

Still, there had to be at least a few who were truly competent and gave Hercule a challenge.

Source: https://www.cbr.com/dragon-ball-z-hercule-survived-cell-fight-videl-strength/