Best movies like The Claws of the Hun

The Unseen Enemy in this wartime meller is Nick (Leo Carrillo), the outwardly effusive manager of a San Francisco waterfront café. To make enough money to ensure his daughter Gen's (Irene Hervey) entree into society, Nick sells his services to a gang of foreign spies, who then use Nick's establishment as a rendezvous point. The plan is to covertly send out a Japanese vessel for the purpose of raiding and destroying American merchant ships. The spies' secret code is hidden in the lyrics of a song called "Lydia", which the unwitting Gen performs on request day after day.

A tense WWI spy thriller in which Colonel Duncan Grant (British star Brian Aherne, in his first talking role), parachutes into Germany to gather intelligence on the enemy’s secret ‘W Plan’ and to assist Allied POWs in digging escape tunnels.

French scientists are developing a secret weapon, a gun that uses the mysterious powers of X-ray and ultra violet rays, called a "Ray Rifle." Miss Dalton played the girl that would protect it from German spies.

Blind detective Duncan Maclain gets mixed up with enemy agents and murder when he tries to help an old friend with a rebellious stepdaughter.

Chan, in Paris for a reunion with friends from World War I, becomes involved in investigating the murder of a munitions manufacturer who was supplying arms to the enemy, even as the rising clouds of World War II force the city into nightly blackout status..

Maria is married to Captain Franck of German Intelligence. He does not know she is a Russian assigned to spy on him. When he is told to uncover a leak, he vows revenge on his wife.

A German submarine is sent to the Orkney Isles in 1917 to sink the British fleet.

The story, starring Constance Bennett and Douglass Montgomery, involves a Canadian POW being hidden by a German citizen during World War I.

FBI agents Carl Becker and John Trent raid a New York hotel, sending Nazi spies to an upstate hunting lodge.

Reporter vs. German spies and their new metal.

In France during World War I, an army payroll car containing $250,000 turns up missing. A GI, nicknamed "Spuds" because of his prowess at peeling potatoes, discovers that it was stolen by German spies, and--since his captain was responsible for the car and will be in big trouble if it's not recovered--goes behind the enemy lines to retrieve both the car and the $250,000 payroll.

During World War I, the beautiful and patriotic Leslie Selden is courted by two ardent admirers: Jack Wynn, a young man not yet taken by the draft, and Dr. Wolff, a Danish scientist who, in reality, is a German agent. When Jack learns that Wolff is masterminding a plot to bomb several munitions factories and destroy the water system in New York City, he goes to the spy's home and confronts him.

It was the sister ship of the infamous Titanic... and its final destiny was the same. Experience the true untold story of Britannic, a tumultuous, epic voyage of human passion, courage and betrayal aboard an ill-fated ocean liner bound for a shattering demise. With the world at war, an undercover British agent (Amanda Ryan), embarks the Britannic in search of a German spy believed to be on board to sabotage the ship. Posing as a governess, the undercover agent finds herself falling in love with the ship's chaplain (Edward Atterton). In a stunning discovery, the lovers suddenly find themselves enemies of war. And when a massive explosion deals a deathblow to the ship, their battle becomes one for their own survival. With a dynamic, international cast and a story line that hosts a chilling tale of espionage, politics and romance, Britannic brings one of history's most devastating events to riveting, new life.

A French air ace discovers that his showgirl wife's first husband is still alive.

A CIA agent and a geneticist battle to keep a deadly biological weapon from falling into the wrong hands when the weapon's inventor is kidnapped.

Detective Ellery Queen aids Free Dutch agents battle Nazi spies over a prize of industrial diamonds.

In the office of Major Northfield, the quartermaster of the Pacific Coast, a leak has been discovered which may endanger the safety of American transports that are secretly carrying troops across the Pacific. Nara-Nara, a Japanese detective, is assigned to the case because his country has guaranteed safety to these transport ships. Nara-Nara believes that Northfield is guilty, although in reality it is Northfield's secretary Kitty Little, a girl of German ancestry, who is passing information to Dr. Ebell Smith, a German agent. Nara-Nara falls in love with Kitty, but soon after discovers that she is the leak in the quartermaster's office.

Louis and August Siever, the twins sons of a German father and American mother, are traveling in Europe when war breaks out. August joins the Kaiser's army, but Louis, a supporter of the United States, is practically made a prisoner in Berlin for a year while he tries to prove his American citizenship. After a violent confrontation with Louis, August steals his brother's passport and leaves for New York with Gerda Anderson, a German spy.

An Englishman impersonates an imprisoned German officer and "returns" to Germany to become a national hero. A female German spy is assigned to check him out but falls in love with him.

When Barry Corvall discovers that his new bride is a possible enemy agent, he resigns from the diplomatic service to go undercover to route out an espionage ring planning to destroy American industrial capability.

Parisot, a French spy in World War 1, returns home on a secret mission to visit his mother, and finds that Victoria, the wife of a German general, is billeted in the Parisot home while waiting to see her husband. Victoria discovers that Paul is a spy and, although fascinated by him, plans to reveal his identity to her husband. When the latter is unable to visit her, she attempts to go to the German army headquarters.

Angela maintains a coastal lighthouse in Italy, where she awaits the return of her brothers from the war. She learns they are casualties and takes solace in the arms of an American sailor washed ashore. However, the sailor turns out to be a German spy, and she is torn between her love for him and her realization that he is part of the enemy force that has destroyed her family.

Susie organizes plays to benefit the Red Cross. She marries her hero, Robert, but finds out he did it to avoid the draft. She begs to be taken in his place and is soon captured by the enemy. Will Robert become the hero she believed he was?

Army training Sgt. Gray makes a bet that he can get himself invited to breakfast with his commanding officer, General Markley. But he gets into an unhappy tangle with a couple of enemy spies (and a happy tangle with the general's daughter) before the bet is finally decided.

During World War I, German spies will stop at nothing to spy on the allied war plans stored at Gibraltar.

During World War I, a professional thief known as The Lone Wolf is assigned to steal a cylinder with important information from behind the German lines and bring it to Allied intelligence headquarters. However, German agents set out to stop him, headed by the man who was responsible for the death of the thief's sister.

Yvonne von Krutz, a Belgian, lives with her German husband Karl, whom she was forced to marry, and her spirited little brother Jacques in a farmhouse on the Belgian countryside. With the German invasion of Belgium, Karl joins the German forces, and Jacques is taken to a reformatory to be trained as a munitions worker. When Karl is taken prisoner, Capt. Jefferson Strong, an American engineer, assumes the German's identity and discovers an underground supply of explosives near the von Krutz farm. By means of a tunnel, the Americans plan to mine the explosives. To save Jacques and a group of children from the munitions factory, however, Jefferson sends them across the American lines through the tunnel, but they lose their way, and he is forced to disable the mine. Jefferson is court-martialed, but King Albert of Belgium, who has befriended little Jacques, intercedes on his behalf. Learning that Karl has been killed, Jefferson pursues his budding romance with Yvonne.

A German-American father, loyal to his new U.S. home, finds himself on opposite sides with his son in the wartime conflict between Germany and America. The son becomes involved with German agents plotting against U.S., and the father must decide between his son and his adopted homeland.

In this propaganda film, athletic silent star George Walsh plays reporter Jack Bartlett, who interviews President Wilson regarding the Fourth Liberty Loan. The story never appears in the paper, however, because its new owner, Otto Crumley, is pro-German. So Jack quits his job and begins canvassing for the Liberty Loans. In the midst of his vigorous campaigning he also halts Crumley's plans to inspire a strike at a munitions plant.

Hearing that the United States has just declared war on Germany, Bill Durham hurries to a recruiting station to enlist, but because he has flat feet, he is rejected. He falls in love with Barbara Knowles, whose guardian, August Myers, unknown to Barbara, is a German agent. When Bill learns that Myers plans to stir up trouble on the border of the United States and Mexico, he catches the train to New Mexico and routs out Myers' gang of bandits.

Phillip Gresson is in the employ of the British secret service, while heroine Judith is a spy for the Enemy. Hoping to gain possession of the usual Secret Plans, Judith pretends to be in love with Phillip. Only after nursing the seriously wounded Phillip back to health does Judith come to the realization that she genuinely loves him.

Neysa von Igel, who is living with her supposed grandfather, Adolph Schmidt, loves America, although she believes herself to be German-born. Unknown to Neysa, when she was three years old, her father and mother, both American-born, were killed in Germany by Emil Koenig, who, in punishment, was sent to the United States to work in the interest of the government of the Fatherland, and who is now associated with Schmidt in his manufacturing enterprise. Koenig demands that Neysa work in behalf of Germany. She revolts and escapes to the home of David Hale, who had been her grandfather's attorney, but who is now in the service of the United States Government. Hale and Neysa are married and depart for France, where the girl again encounters Koenig, and, after many thrilling adventures, she kills him in self-defense. - Written by Moving Picture World synopsis, from IMDB.com

When the Great War begins, English sportsman Cyril Hammersley is thought to be a slacker because he refuses to join the army for pacifistic reasons. His American fiancée, Doris Mathers, knows that he is not a coward, but she questions his patriotism when Sir John Rizzio intimates that Hammersly may be a German spy.

A spy known as "1932" during World War I, is commissioned by the German Secret Service to trail English agent Captain Woodhouse to the Straits of Gibraltar and there effect the destruction of the British fleet. Before his departure, 1932 helps Jane Gerson, an American girl falsely accused of espionage, and later falls in love with her.

A 1920s circus performer uses every means at his disposal to achieve fame and fortune at the expense of others.