The setting of everyone's favourite Belgian detective Hercule Poirot's adventures isn't explicit, but most episodes are set in the 1930s. Alongside David Suchet's brilliant acting and Agatha Christie's excellent plots, ITV also serves up amazing costumes and Art Deco settings across its long-running series.
There are often a few episodes of Poirot available on ITV Hub. If you want a modern twist on the classic, watch The ABC Murders on iPlayer, which stars John Malkovich in the title role.