Donald Sutherland would later go on to portray Dr. Bethune in Bethune: The Making of a Hero, released 13 years later.

This was a dream project for Otto Preminger. For years he tried to raise finance and even had permission from the authorities to film in mainland China. Ring Lardner Jr collaborated with him on the screenplay.

Donald Sutherland and Kate Nelligan would later appear in Eye of the Needle (1981).