This is the second OSS 177 film, based on Jean Bruce’s 1960 novel Lila de Calcutta, which was the 74th OSS 117 novel. The series predates Ian Fleming’s Bond novels and the first film made from them was filmed before Dr. No.
Secret Agent OSS 117, Colonel Hubert Bonisseur de La Bath (Kerwin Mathews, The 7th Voyage of Sinbad, The Boy Who Cried Werewolf) is in Thailand after the murder of OSS agent Christopher Lemmon, who has been investigating plague epidemics in India. So, you know, if you don’t want to watch a pandemic movie, miss this.
Lemmon was killed because he found out that the medicine that Hogby Laboratories was making had been switched with plague germs, thereby killing much of the population.
OSS 117 then breaks into the secret lair of Dr. Sinn (Robert Hossein, who directed Cemetery Without Crosses), an Indian hypnotist and psychologist. Or maybe he was, because now he is wearing a cape and working for a group called the People Elect who wants to decrease the world’s population and stop nuclear testing. Why do I keep identifying with Eurospy villains?
You can watch this on Amazon Prime.