I, Robot2004

Spooner:
[picks up a book on Lanning's desk] Hansel and Gretel... Is that on the USR preferred reading list?

Dr. Calvin:
Not precisely. [Spooner picks up a stool and swings it into an unbroken window in Lanning's office, which cracks, but doesn't break] What in God's name are you doing?!

Spooner:
Did you know that was safety-glass? Be pretty difficult for an old man to throw himself through that, don't you think?

Dr. Calvin:
[nonplussed] Well, he figured out a way.

Spooner:
[unconvinced] Uh-huh. [looks around the office]

Dr.Calvin:
Detective, the room was security locked. Nobody came or went. You saw that yourself. Doesn't this have to be suicide?

Spooner:
Yep. [drawing his gun] Unless the killer is still in here. [starts searching through a container full of robotic parts]

Dr. Calvin:
[realising what Spooner's getting at] You're joking, right? [follows him] This is ridiculous-

Spooner:
Yeah, I know. The Three Laws. Your perfect circle of protection.

Dr. Calvin:
"A robot cannot harm a human being." The First Law of Robotics.

Spooner:
Yeah, I've seen your commercials. But doesn't the Second Law say that a robot must obey any order given by a human. What if it was given an order to kill?

Dr. Calvin:
Impossible, it would conflict with the First Law!

Spooner:
Right, but the Third Law states that a robot can defend itself.

Dr. Calvin:
Yes, but only if that action does not conflict with the First or Second Laws.

Spooner:
Well, you know what they say; Laws are made to be broken.

Dr. Calvin:
No. Not these Laws. They are hard-wired into every robot. A robot can no more commit murder than a human can... walk on water.

Spooner:
Well, you know, there was this one guy, a long time ago-

[Sonny jumps out of the container, knocking Spooner's gun out of his hand]