Laserdisc v. DVD

One thing you can do when you have a DVD and a laserdisc of the same movie is to play them simultaneously. This is good clean fun. It also gives a chance to compare an original version of the Star Trek episode, City on the Edge of Forever (DVD) and the sabotaged version (laserdisc). The sabotage was the replacement of source music to comply with some witless copyright issue. I have no other duplicates to compare.