(written from a Production point of view)
William Smith is an actor who played several background roles on Star Trek: Deep Space Nine and Star Trek: Voyager. He received no credit for all of his appearances. His costume from the episode "Virtuoso" was sold off on the It's A Wrap! sale and auction on eBay.  HIs costume as a Ferengi waiter on Deep Space Nine was also sold off and worn by fellow background performers Alan Viner and Ken Ziff. 
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Star Trek appearances Edit
- This has to be confirmed, the entry was removed from IMDb and it is not sure that he really appeared in this episode.