Overlooked and Underrated Film

What a superb film this is. I only just watched it this year and I don't know why I waited. I have a fascination for serial killers and also the psychology behind killers and other criminals of this nature, and Richard Attenborough here is just amazing. So 'Norris Cole' and yet at the same time so evil, I don't think any other actor could have done this role justice. Superb!