Yes, I had thought of that as well regarding the GSR. Also, I just watched it again last week, and the gun shot was so loud, that despite the film going on in the theater, someone would most certainly have heard the gunshot. He should have had a silencer to make it more believable. Even so, it's still a fantastic episode. Very clever story line, all the characters where great. And Robert Culp always made such a great murderer with that flair of cockiness about him. The golfing scene was fantastic!

It's one of my favorite episodes and one I always keep on my iPod Touch.