David Suchet Reflects on 25 Years as Poirot - NYTimes.com - I agree - he is the definitive Poirot. He fit my vision of Poirot from reading all Agatha Christie's mysteries and I have loved his portrayal from the first episode.
Kevin Sorbo as Hercules an Michael Hurst as Iolaus. I used to watch this show, as well, but maybe not as much as Xena. Like I did with Xena, I would make arm cuffs out of everyday items and pretend to be Hercules.