(written from a Production point of view)
Stephen Blackehart (born 1 December 1967; age 46) is an actor who had two different background parts in the Star Trek: Deep Space Nine episode "The Dogs of War". He portrayed a Cardassian civilian during the bomb attack sequence and appeared as a Starfleet science officer aboard the USS Sao Paulo. The latter one was dubbed "Lieutenant Pa'ak" by Blackehart.  For both roles he received no credit.
Blackehart is best known for his roles in films such as Retro Puppet Master, Rockabilly Vampire and The Ghouls.