[1] Carradine later said he got the idea to make the film when he was living with Barbara Hershey.
A Dutch director wrote a film for her and they want to make it in Holland.
While there, Carradine started steeping himself in the Mata Hari story.
He decided to shoot the film over the years, so Calista could age.
"[3] They went to India for two weeks with about 12,000 feet of film stock and shot some footage.
"[7] Interest in the project was revived when Richard Linklater shot Boyhood over a long period of time.