Throughout this series you could not take your eyes off John Malkovich – he played Poirot with a quiet power and a soft determination. Gone were the almost comic affectations of past incarnations, replaced by unsureness and existentialism. Yes, the vanity was still there and a sense that the status he once enjoyed was still well remembered, but this was a Poirot whose identity had been stripped bare and was now being forced to piece together the shards of his personality and his experiences. To move forward, to feel part of this world again, he had to acknowledge and process everything.
Before we only knew Poirot as a totem, and a vehicle for carrying a mystery. During this ABC Murders Hercule Poirot became a fully-formed human being before our eyes. And that was thrilling to watch.
For John Malkovich, he fit this part, this person like a glove.