(written from a Production point of view)
Robert Scott is an actor who appeared in two episodes of Star Trek: Voyager. He first played a Vaskan in the fourth season episode "Living Witness" from which his costume was later sold off on the It's A Wrap! sale and auction on eBay.  He then appeared as a Ventu in the seventh season episode "Natural Law", identified by the call sheets. He received no credit for both appearances.