The Secret Man

Physicist Marshall Thompson is kidnapped by John Loder, who demands to know about the project he is working on. Despite what is implied to be a grueling session, Thompson doesn't crack. So Loder, who actually works for counter-espionage recruits him. There's someone on the project who is leaking secrets. Marshall will help him catch the bad guy by pretending to be willing to sell what he knows.

It's competent in all departments, even as it betrays its cheapness in production. Still, the plot keeps chugging long, and the big climax at the end is shot on location by cinematographer Geoffrey Faithfull, in gloomy-looking, wrecked buildings that offer the grubby work of spies an appropriate venue. It's not a great movie, but it's good enough to fill its 70 minutes pretty well.