The Four Just Men 1939 It was released in the US in 1941 under the name The Secret Four. Based on the 1905 Edgar Wallace novel of the same name, screenplay by Angus MacPhail, Sergei Nolbandov and Roland Pertwee, directed by Walter Forde. Roland is Jon Pertwee's father, besides writing a fair number of films he was an actor. I've seen three other films he wrote: The Ghoul 1933, King Solomon's Mines 1937 and Pimpernel Smith 1941. Andrew wrote the screenplay for the 1931 version of The Ghost Train, later he would write some films for George Formby. Walter directed a few films I've seen, The Ghost Train 1931, The Ringer 1931, Rome Express 1932, Chu Chin Chow 1934 and the 1941 Arthur Askey film The Ghost Train.
The four just men are actor Humphrey Mansfield, played by Hugh Sinclair, playwright James Brodie, played by Griffith Jones, fashion house owner Léon Poiccard, played by Francis L Sullivan, and foreign correspondent James Terry, played by Frank Lawton. They've banded together to punish criminals.
As the film opens Terry escapes a Prussian prison just before he's executed. He's got some good intel about 5th columnists inside the British government. A big problem with WW2 looming on the horizon.The four just men do their thing, they are ruthless, the baddies are barely a match. There's plenty of murder, some fist fights and gun shooting, plenty of running about and a slew of interesting characters.
The version of the film on the Internet Archive is the one with the tacked on anti-Nazi ending, the original film didn't call the baddies German out rightly. I enjoyed it and would welcome another view down the road. I've seen quite a few of the films made from Edgar Wallace's books. Lucky for me I've still got a few more adaptions left to see. Not many though.