In the third season episode of Highlander entitled Methos, Duncan takes a young aspiring soprano to hear the Paris recital of the world's greatest tenor Antonio Neri (acutally Duncan's nemisis Kalas).

Later, while Neri and the young woman are alone in his salon, they are listening to a recording of Banquo's aria from Verdi's opera Macbeth. Neri says to the woman something to the effect that he never cared for the way Caruso sang that aria. We are to understand that this was a recording of Caruso, and that Neri could sing it better.

The problems are: 1)Caruso was a tenor. 2)Banquo is a bass role. 3)The voice is clearly not that of a tenor, and Caruso would never have recorded it. An amateur new to opera could legitimately make such a mistake, but the world's greatest tenor (who incidentally was nearly 2000 years old) could not be forgiven for such an error, (and she didn't seem to know any better either). Rather surprising considering the level of research to which they lay claim in the DVD featurettes.