(written from a Production point of view)
Peter Slutsker (born 17 April 1958; age 62) is a former actor who appeared as four different characters in episodes of Star Trek: The Next Generation and Star Trek: Voyager. In all three of his TNG appearances, he portrayed Ferengi. Slutsker changed his name legally around the millennium and is today better known as Peter Marx.
For the episode "Year of Hell", he filmed his scenes on Wednesday 13 August 1997 on Paramount Stage 8 and for "Year of Hell, Part II" on Wednesday 27 August 1997 on Paramount Stage 9. His costume from this episode was later sold off on the It's A Wrap! sale and auction on eBay. 
Slutsker was born in New York City, New York and grew up in Morristown, New Jersey. Between 1987 and 2002, he was married to dancer and actress Barbara Hoon. Following their divorce, Slutsker became a single father and "retired" from acting in 2004.