What profession is held in common with Donald Sawyer and Roberto Gavaldón?
Roberto Gavaldón Roberto Gavaldón (June 7, 1909 in Jiménez, Chihuahua – September 4, 1986 in Mexico City) was a Mexican film director.
Don Ingalls Donald G. Ingalls (July 29, 1918 – March 10, 2014) was an American screenwriter and television producer. He was a lifelong friend of Gene Roddenberry, having served in the Los Angeles Police Department with him.