And as the hour approached for the execution, in his own mind, Collins became both the executioner and the victim. He would pace up and down, transformed in almost a kind of exorcism when he knew he was responsible for taking someone's life.

At the Sex Institute in Bloomington, Indiana, they were a phenomenal help, too. We went out there for a few days, and they gave us access to materials. And the biographies, there are four or five, ranging from very poor to excellent.

And the Institute sent me a little film footage of Kinsey himself preparing to do an interview for television to talk about his work, so that was quite valuable for me.

Liam Neeson Quotes