Child of Darkness, Child of Light is a 1991 American television horror film directed by Marina Sargenti, and starring Tony Denison, Brad Davis, and Claudette Nevins.
 It is based on the novel "Virgin" by James Patterson.
 The film follows a Catholic priest who goes to investigate two reported cases of immaculate conception; one of God, and the other of the devil.
 The film was shot in Portland, Oregon, and premiered on May 1, 1991.
Midnight Express is a 1978 American-British-Turkish prison drama film directed by Alan Parker, produced by David Puttnam and starring Brad Davis, Irene Miracle, Bo Hopkins, Paolo Bonacelli, Paul L. Smith, Randy Quaid, Norbert Weisser, Peter Jeffrey and John Hurt.
 It is based on Billy Hayes' 1977 non-fiction book "Midnight Express" and was adapted into the screenplay by Oliver Stone.
The Plot to Kill Hitler is a 1990 television film based on the July 20 plot by German High Command to kill Adolf Hitler in 1944.
 Brad Davis stars as Colonel Claus Schenk Graf von Stauffenberg, who plants a bomb in the conference room of the Führer's headquarters in East Prussia.
Robert Creel "Brad" Davis (November 6, 1949September 8, 1991) was an American actor, known for starring in the 1978 film "Midnight Express" and 1982 film "Querelle".
Cold Steel is a 1987 American thriller film directed by Dorothy Ann Puzo and starred Brad Davis, Sharon Stone, Jonathan Banks and Adam Ant.
 This is one of a few action films to be directed by a woman.
Rosalie Goes Shopping is a 1989 English-language German film directed by Percy Adlon and starring Marianne Sägebrecht, Brad Davis, and Judge Reinhold.
A Small Circle of Friends is a 1980 American drama film by United Artists starring Brad Davis, Karen Allen, Shelley Long, Jameson Parker, Peter Mark.
Richard Friedenberg is an American screenwriter and film director.
 He wrote the screenplay for "A River Runs Through It" (1992), starring Brad Pitt, for which he was nominated for an Academy Award, and the screenplay for the Hallmark Hall of Fame television film "Promise" (1986), starring James Garner and James Woods, for which he won an Emmy Award.
 He also wrote the screenplay for "Dying Young" starring Julia Roberts and wrote and directed "The Education of Little Tree" (1997).
Querelle is a 1982 West German-French English-language drama film directed by Rainer Werner Fassbinder and starring Brad Davis, adapted from French author Jean Genet's 1947 novel "Querelle de Brest".
 It marked Fassbinder's final film as a writer/director; it was posthumously released just months after the director died of a drug overdose in June 1982.
The Blackout is the second studio album by American Christian hip hop artist Derek Minor, then known as PRo, released on July 13, 2010 through his own label, Reflection Music Group.
 In promotion of the album, a short film, also titled "Redemption", was released, and the track listing was announced on June 29, 2010.
 The album met with a mixed reception from critics - Bob Marovich of the Journal of Gospel Music praised the album, giving it a four out of five, but Brad Davis of Holy Culture was less favorable, rating the album six-and-a-half out of ten and stating that he disliked the new direction of PRo now that he partnered with Reach.

Question: Who wrote the screenplay for the 1978 film starring Brad Davis? 
Answer: Oliver Stone