In London a shape charge wielding master-criminal comes up with a foolproof plan for robbing a bank and outwitting Scotland Yard's pursuit, but during the getaway he hides his haul in a radio set in the apartment of a certain Capt. Bulldog Drummond, leading to a murder, punch-ups, an expedition to France, and a night in a French jail cell and a break-out, in a race to reach Bulldog's fiancee - who has taken the radio set with her on holiday unaware of its contents - before the villain does: ending in a roof-top fight and the Bulldog finally tying the matrimonial knot in an explosive finale to his bachelorhood.
An absent minded Professor Downie makes a call upon Drummond as he is making plans for his much-delayed wedding to fiancee Phyllis Claverling. The professor informs Drummond that a fortune was buried in one of the walled off storerooms underneath his estate, and that Downie was in possession of a book written in code that would lead them to discover the treasure. Unfortunately for the professor, someone else also wanted the riches and Drummond once again is dragged into the plot as the code book is stolen, Professor Downie is murdered, and Phyllis is kidnapped.
Mary Whitman has arrived in Reno to obtain a divorce. While there, she is arrested on suspicion of murdering a fellow guest at her hotel (which specializes in divorcers).
For treating a wounded revolutionary, respected surgeon, Dr. Charles Gaudet (Boris Karloff) is sentenced to life imprisonment to the infamous French penal colony on Devil's Island. It isn't long before he speaks out against the inhuman conditions and incurs the anger of the brutal prison commander, Colonel Armand Lucien (James Stephenson). But when Lucien's daughter Collette receives life-threatening wounds in an accident, the only person on Devils Island who can save her, is Gaudet.
The film opens with a description of the Black Tom explosion of a munitions supply located in Jersey City on the Hudson River. The explosion, which occurred during World War I was an act of sabotage by German agents.
The Four Men are British World War I veterans who unite to work in secret against enemies of the country. They aren't above a spot of murder or sabotage to achieve their ends, but they consider themselves true patriots.
Lorsqu'un gorille de cirque évadé semble s'être livré à un déchaînement meurtrier, un avocat menacé appelle le trio de détectives Garrity, Harrigan et Mullivan à agir en tant que gardes du corps. En peu de temps, nous découvrons que l'avocat a plus à offrir qu'il n'y paraît, et le singe peut être innocent après tout. Quand une jolie jeune héritière fait face au péril, c'est à notre trio héroïque de sauver la situation.
Une jolie femme chinoise, cherchant l'aide du détective de San Francisco James Lee Wong, est tuée par une fléchette empoisonnée dans son hall d'entrée, n'ayant le temps que de griffonner "Captain J" sur une feuille de papier. Elle s'avère être la princesse Lin Hwa, en mission militaire secrète pour les forces chinoises combattant l'invasion japonaise. M. Wong trouve deux capitaines avec le premier J dans l'affaire, ni l'un ni l'autre étant tout à fait ce qu'il semble; il y a du brouillard sur le front de mer et quelqu'un a toujours ce pistolet à fléchettes empoisonnées ...
American archeologist Howard Stevens (John 'Dusty' King) recovers the ancient crown of the Queen of Sheba, the priceless artifact is shipped to the San Francisco Museum. Ostensibly on vacation, Mr. Moto (Peter Lorre) shows up to guard the crown from a notorious master thief, whom everyone assumes is dead. Using a variety of disguises, the very-much-alive thief succeeds in pilfering the crown-only to discover that Moto has remained three steps ahead of him throughout the film.
The British Navy in Port Said is making plans for naval manoeuvres with the French fleet. Plans are delayed because the British Secret Service has been warned of possible sabotage.
In 1932, aboard the passenger ship, the S.S. Arcturus, engineer "Crusher" McKay (Victor McLaglen) runs a "tight ship", both beloved and feared by his men. The ship's doctor, "Doc" Tony Craig (Victor McLaglen), has signed on in Shanghai to be on the San Francisco bound trip. He wants to be near his former sweetheart, nurse Ann Grayson (Wendy Barrie).
Panama Lady is a cleaned-up remake of the 1932 Helen Twelvetrees vehicle Panama Flo. Lucille Ball essays the old Twelvetrees role as Lucy, a nightclub "hostess" stranded in Panama by her ex-lover Roy (Donald Briggs). Victimized by a shakedown orchestrated by Roy, oil rigger McTeague (Allan Lane) holds Lucy responsible. To avoid landing in jail, Lucy agrees to accompany McTeague to his oil camp as his housekeeper. Assuming she's been brought to this godforsaken spot for sexual purposes, Lucy eventually realizes that McTeague's intentions are honorable: All he wants is his money back, and he expects our heroine to work off the debt on her feet! Ultimately Lucy and McTeague fall in love, but not before the scurrilous Roy re-enters her life.
Advanced British aircraft prototypes, carrying experimental and secret equipment are vanishing with their crews on test flights. No one can fathom why, not even spymaster Major Hammond (Ralph Richardson) or his sister Kay (Valerie Hobson), a newspaper reporter, who is working undercover in the works canteen used by the crews at the Barrett & Ward Aircraft Company.