the German dubbing isn't very good either. There are only so many voices to use for a certain character group, so they are use the same voices in different series.
Which is very confusing, when you are
1. used to the original voices. In the German dubbing I keep mixing up Nick with Greg and Sara with Catherine because their voices aren't that distinguishable.
2. watching different primetime series, because chances are that any voice will be used on more than one series. For example, Greg has the same voice as McGee on NCIS.
This is one of the main reasons why I watch the originals (apart from the one season delay in Germany...)