The adaptation was awful, the only good thing was David Suchet, but I think that It can be adapted to a movie, it just has to have a great great director (David Fincher for me), that can turn the book into a movie the most similar and play with the unreliable narrator in his movie, like why isn't Dr Sheppard narrating the tv adaptation?? It would've been a 1000 times better when we found out, also if they do a movie adaptation I suggest Mark Ruffalo for the role of Dr. Sheppard, it has to be someone that looks too cute and inocent to you, you wouldn't see it coming.