Board Thread:Spoilers!/@comment-5899967-20150208192922/@comment-24674051-20150401144539

You can not always trust IMDB as a source. It's fairly reliable, but it is also open to anyone adding information, which may or may not be reviewed on a consistent basis by the studios.

Also, the times that I have seen "Dancer"  (or some similar limted part, like bank teller or FBI agent) listed, it was really nothing more than a glorified extra, with no lines (or one small line), and maybe one scene. (Granted, I would love to appear in 1 scene of OUaT, and I can't blame the people for wanting the recognition.)