|Catherine the Great||R1|
This DVD is available in Region 1. It appears that the Region 1 version is not 16x9 enhanced. However, according to published specifications it has an extra 10 minutes per episode. It is always difficult to know whether the additional minutes were worthy. It becomes a trade-off for visual quality as opposed to thoroughness. It's a personal choice, but I would probably opt for the extra time.
Neither version has any extras.