Nick Cassavetes and Donald Cammell, are actors?
Nick Cassavetes Nicholas David Rowland Cassavetes (born May 21, 1959) is an American filmmaker and actor.
David Nykl David Nykl (born 7 February 1967) is a Czech Canadian actor of film, television, commercials and theater. He is best known for portraying Dr. Radek Zelenka in the SyFy television series "Stargate Atlantis", and Anatoly Knyazev in DC's comics' popular series Arrow.