The Secret Man is a 1959 British second feature ('B')[1] black-and-white film directed by Ronald Kinnoch and starring Marshall Thompson, John Loder and Anne Aubrey.

He and his assistant-fiancée Jill Warren helps Major Anderson of Special Branch to track down a spy inside the station.

The Monthly Film Bulletin wrote: "This topical 'cloak and dagger' film places its thrills efficiently against realistic backgrounds in Hertfordshire and West London, but unfortunately fails to avoid such creaking clichés as the spy chief's femme fatale blonde agent, and the 'cricket match' attitude of the detectives towards their work.

On the other hand the highly capable performance of veteran John Loder recalls Jack Warner, in similar parts, at his best.

"[6] The Secret Man was released as part of Renown Pictures Crime Collection DVD Volume 1 (2017).