What job did actor Clark Johnson and screenwriter Michel Boisrond both have in common?
Clark Johnson Clark Johnson (born September 10, 1954), sometimes credited as Clark "Slappy" Jackson, Clarque Johnson, and J. Clark Johnson, is an American actor and director who has worked in both television and film.
Greydon Clark Greydon Clark (born February 7, 1943) is an American screenwriter, director, producer, and actor. His career spans several decades and genres, although the majority of his work has been low-budget productions in the action/horror genres. His most recent work was writing and directing the 1998 science fiction film "Stargames".