It's interesting how many guest stars are on Law and Order now: last week it was Bill Pullman, this week it's Robin Williams, and next week it's Stephen Collins. This episode was very good. It started out with a fast-food manager holding a teenage girl employee hostage because he'd received a phone call claiming the girl had stolen money. The caller claimed to be a police detective and told him to basically sexually assault her. What's shocking is he actually does it. The SVU detectives eventually discover the call was made by a audio engineer, played by Robin Williams. It's soon realized that the engineer is not a sexual pervert, but he merely wants to test out how far people will go to please an authority figure, mimicking the Milligan (spelling?) experiments, which tested how much people would shock a friend to please the scientists.
Robin Williams was very convincing in this episode; it's sort of reminiscent of "One Hour Photo" and of Martin Short's guest spot on SVU a couple years ago.