This show was an absolute disgrace and mockery of the greatest novel of all time. Why Sarah Phelps thought she could improve upon Agatha Christie is something I will never be able to wrap my head around.
If you read, and appreciated this novel, this book is an affront to the nature of the story and the reasoning behind why everything happens the way it does.
Spoiler alert:
To keep the same killer, but remove the psychology behind the why, and the absolute twist of a letter in a bottle with a confession is an sin.
Do not waste your time on this disgrace.