As far as I am concerned

David Suchet is Hercule Poirot, and not just because he has played the part of the Belgian detective for 25 years now. He has brought Poirot to life. It's true, all good things must come to an end. I am sorry this is one of them....

Fastidious Belgian Detective Bows Out: ‘Agatha Christie’s Poirot’ Comes to an End

Of course, for British viewers, the show ended last year on ITV. But the is the last season for PBS. Be sure to catch it tonight if you love Agatha Christie's detective.