This British show is based on books and stories by the Queen of Crime , and feature her fussy but brilliant Belgian detective Hercule Poirot. Using his famous 'little grey cells' and usually accompanied by his affable side-kick Captain Hastings , Poirot unravels the thorniest of cases without letting a hair of his famous moustache stray out of place. / Having decided to set the show in the 1930s, Granada (the production company) gave it an Art Deco theme, while the scripts preserve a lot of Agatha's witty original dialogue - and add to it in an authentic tone. / Currently 9.3/10