"He's a man without conscience," adds Bruce Greenwood, who portrays Caldicott. "He believes that the end justifies the means, and in the pursuit of his scientific goal, he doesn't flinch at leaving many damaged people in his wake."
Production Notes: MGM's Disturbing Behavior site

What David Nutter has to say about
Bruce Greenwood in Disturbing Behavior

The part of Caldicott is played by my good friend Bruce Greenwood. This was the last roles I cast because I really wanted Dr. Caldicott to be attractive and charismatic, not a nut case. Bruce does a wonderful job.
DVD commentary

Bruce wrote his own dialogue in this scene as he did in a couple of others, too....
(on the scene where he cuts into the student's brain)
DVD commentary