This is not your new-age CSI, police procedural that has been done a thousand times on T.V.. This doesn't show you fancy visual effects and fake hacking. There is no inter-agency jurisdiction fighting. No geeks becoming heroes. This is a real character drama. This is story-telling. So, if you lack the patience to bask in the drama and intrigue; if you can't imagine yourself sitting through a show without car chases and gunfights... This is not the show for you.
If you enjoy having your brain worked, emotions stirred, excellent character, superb acting, and wonderful directing without all the fluff Hollywood is so well known for these days... You're in for a treat. The story is expertly crafted and the acting would hold up against many many Oscar winning performances. Malkovich delivers a spellbinding portrayal of Poirot, while the rest of the cast each plays a role. There are very few unnecessary parts here and the story is refreshingly focused. Even Rupert Grint surprised me, which is quite a compliment considering I wasn't particularly fond of how Ron was treated in the Harry Potter movies; though that could have been due to poor directing choices.
A masterpiece that, in my opinion, honors Agatha Christie. You will not be disappointed; unless, of course, you just want to watch another CSI. While there is nothing particularly wrong with shows like that, they lack the depth I really enjoy. They simply do not have the ability to engage on this level because their episodes are too short and seasons too numerous. They have to have filler. The ABC Murders doesn't have filler. It takes me back to when I was a kid... Staying up late at night watching old Sherlock Holmes shows, catching a couple hours of sleep, and then waking up to watch Saturday morning cartoons. A time before my teenage life was overrun with video games, high-school, relationships, and texting.