Lee Nickerson
Lee Nickerson is an actor who played a Romulan senator in the  seventh season episode . As a background actor he received no credit for his appearance and was identified by the name tag of his costume which was sold off on the It's A Wrap! sale and auction on eBay. 

Nickerson served as stand-in on Robert Butler's action thriller Turbulence (1997, with Ben Cross, Catherine Hicks, James MacDonald, Tom Todoroff, and Scott Lawrence) and played a supporting role in the 1982 comedy Lookin' to Get Out, with Bert Remsen.

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Performers
DS9 performers