Best movies like Radar Patrol vs. Spy King

Martians come to Earth to build an H-bomb strong enough to blast Earth out of orbit so that Mars can be moved into its place in closer proximity to the sun. Super-scientist Larry Martin, inventor of the first stratospheric-flight spaceship as well as a jet-powered personal flying suit with helmet, is called upon by the government to investigate ramped-up UFO reports occasioned by the Martians' spaceships. The Martians, meanwhile, led by Marex, engage a renegade earth scientist and a gaggle of gangsters to help them steal supplies, operate a menacing robot, and build their bomb. This movie serial in 12 chapters was originally planned as a sequel to "Radar Men From The Moon" with Commando Cody as the hero but at the last moment the main characters' names were changed and all other references to that serial removed from the script.

Merchant seaman Archie Gibbs manages to survive when his ship is torpedoed by a German submarine. Disguising himself in the uniform of a dead Nazi spy, Gibbs is picked up by the Nazi U-boat. He manages to convince the German sailors that he's the spy, and in this guise he tries to rescue a group of captured Allied scientists.

A federal agent and a female reporter team up to catch a criminal gang that has kidnapped a scientist in order to get his formula for a new type of poison gas.

A gang of urban street kids and a club of suburban would-be federal agents, at first rivals, join forces to rescue the father of one of the kids, the inventor of a super-explosive and its remote detonator, from the clutches of a band of foreign subversives call the "Flaming Torch Gang". A 12-episode movie serial with the chapters: •1. Enemies Within •2. The Blast of Doom •3. Human Dynamite •4. Blazing Danger •5. Trapped By Traitors •6. Traitors' Treachery •7. Flaming Death •8. Hurled Through Space •9. The Plunge of Peril •10.The Toll of Treason •11.Descending Doom •12.The Power of Patriotism

During the Cold War, the Soviet Union captures U.S. pilot Francis Gary Powers after shooting down his U-2 spy plane. Sentenced to 10 years in prison, Powers' only hope is New York lawyer James Donovan, recruited by a CIA operative to negotiate his release. Donovan boards a plane to Berlin, hoping to win the young man's freedom through a prisoner exchange. If all goes well, the Russians would get Rudolf Abel, the convicted spy who Donovan defended in court.

The flamethrower-wielding vigilante John Eastland returns to rid New York of a drug lord and his gang.

In a not too distant future, a totalitarian state run by ‘The Director” controls all aspects of life. All enemies of the state are dealt in the harshest way. Most of them are executed by the secret government’s assassins. The best operative is code-named “Condor” – an elite agent and hit man for the government. However, in his latest assignment, “Condor” fails to kill an opposition leader, and finds himself on the run from the very same government agency that he works for. This sets in motion a chain of events with unforseen consequences for all involved.

The Daily Clarion hires detective story writer Steve Colt to investigate the deaths of a group of scientists working on an atomic rocket development project. Behind the killings is fortune teller Sombra, a spy from an Asian country intent on world domination, who is determined to pilfer the atomic rocket by luring workers from the project to her parlor and killing them with black widow spider venom when they refuse to cooperate.

Prof. Millard pretends to be dead and helps Jeff King ferret out Vulcan, the evil traitor at the science academy. Donning his Rocket Man costume King goes from one hair raising rescue to the next in order to keep the newly invented Decimator out of the clutches of Vulcan and his minions.

The Shadow battles a villain known as The Black Tiger, who has the power to make himself invisible and is trying to take over the world with his death ray.

Pulp hero "The Spider" seeks to destroy all criminals. In this serialized adventure, he battles The Octopus, who intends to replace the government of the United States.

Based on a successful comic book that began in 1941, the Blackhawks were seven flyers who banded together during WW II to fight the Nazis. After the war, they continued to fight evil where ever they find it. In this movie, they are battling a group of spies and saboteurs bent on destroying democracy. The Blackhawks foil a succession of plots, with a cliff hanger ending in each episode.

Prior to the United States' involvement in World War II, the masked vigilante Spy Smasher fights Nazi agents operating within the US, led by the treacherous sabotage leader codenamed The Mask.

An American scientist is sent to Red China to steal the formula for a newly developed agricultural enzyme. What he is not told by his bosses is that a micro-sized bomb has been planted in his brain so that should the mission ever look likely to fail, he can be eliminated at the push of a button!

The mysterious murder of a US senator bearing the distinctive trademark of the legendary Soviet assassin 'Cassius', forces retired CIA operative, Paul Shepherson to team with rookie FBI agent, Ben Geary to solve the crime. Having spent his career chasing Cassius, Shepherdson is convinced his nemesis is long dead, but is pushed to take on the case by his former supervisor, Tom Highland. Geary, who wrote his Master's thesis on Shepherdson's pursuit of the Soviet killer, is certain that Cassius has resurfaced.

Four flying G-Men protect America against enemy spies; one of the four assumes the identity of The Black Falcon, to befuddle the saboteurs even further.

Three different men, three different worlds, three different wars – all stand at the intersection of modern warfare – a murky world of fluid morality where all is not as it seems.

Several murders of nuclear scientists, that baffles Scotland Yard, occur in London about the same time that Bill Locklin, a special officer from the United States State Department, arrives to oversee the transfer of Professor Leon Dushenko, a Russian scientist who as fled the U.S.S.R. An attempt is made on Dushenko's life with a monkey's paw-print found at the scene.

Jean Evans of an international wildlife foundation, who is known to Africa as 'the Panther Girl' because of her bravery in jungle living, stumbles on a plot by a mad scientist to frighten the natives out of a diamond-laden district by chemically growing crayfish to giant size, and enlists the aid of a game hunter friend to prevent a monster rampage and bring the culprits to justice.

A no-nonsense engineer is hired to oversee construction of the Whitney Tunnel, a project that has been plagued by a series of mysterious--and often fatal--accidents.

During the Spanish Civil War, an agent on a mission to purchase coal meets with murder and counterspies.

The Wrecker wrecks trains on the L & R Railroad. One of his victims is Larry Baker's father. Baker wants to find the evildoer, among a host of suspects, but it will be difficult since the Wrecker can disguise himself to look like almost anyone

Dick Tracy's foe for this serial is the crime boss and Masked Mystery Villain The Spider/The Lame One and his Spider Ring. In the process of various crimes, including using his Flying wing and sound weapon to destroy the Bay Bridge in San Francisco and stealing an experimental "Speed Plane", the Spider captures Dick Tracy's brother, Gordon. The Spider's minion, Dr. Moloch, performs a brain operation on Gordon Tracy to turn him evil, making him secretly part of the Spider Ring and so turning brother against brother.

A mad scientist named Dr. Satan plots to steal key pieces of technology to enable him to build an army of robots based on his prototype to conquer America. The only one standing in his way is Bob Wayne, who fights Satan as the enigmatic Copperhead. Mysterious Doctor Satan is a 1940 film serial named after its chief villain. Doctor Satan's main opponent is the masked mystery man, "The Copperhead", whose secret identity is Bob Wayne, a man searching for justice and revenge on Satan for the death of his step-father. The serial charts the conflict between the two as Bob Wayne pursues Doctor Satan, while the latter completes his plans for world domination.

Tom King Jr. seeks to discover who murdered his father, a Texas Ranger; the trail leads to a network of Axis spies.

Greedy traders have kidnapped a researcher, hoping he will reveal the location of a treasure in a hidden village. Family and friends of the researcher come looking for him. Adventure ensues.

Larry Willis and Bill Wane are security guards who ride in the back of Banks Co. armored trucks. When they barely avoid a robbery, they return to headquarters, where their boss John Hale introduces them to detective Tom Sheridan, who will be working with them to uncover a new gang of robbers.

G-Men in Washington break up a powerful spy ring and capture the ringleaders.

A team of two-fisted insurance investigators (one of whom disguises himself as The Masked Marvel) endeavor to discover and thwart the loathsome saboteur Sakima.

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.

When the nephews of Phyllis Carter are killed in an automobile crash while under the influence of narcotics, she persuades Police Lieutenant Jim Hahan to use her as an undercover agent.

A former OSS agent is assigned to rescue two atomic scientists from the dastardly Russians and spirit them away from behind the Iron Curtain.

Famed aviator Bruce Gentry is working with scientist Andrew Benson, setting out to uncover the origin of a deadly secret weapon---an electronically controlled flying disc which can be directed at moving or stationary targets. The disc was master-minded by an enemy agent known only as "The Recorder" because...he speaks entirely via recordings. Aided by rancher Frank Farrell and his sister Juanita "Nita" Hodges, Gentry consistently foils "The Recorders" schemes, which are carried out by "The Recorder's" henchmen, Krendon, Allen and Chandler, including an attack on the Panama Canal.

An internationally-notorious criminal scientist returns to the US to sell his latest invention, a disintegrating gas, to a foreign power. When he arrives, however, he is spotted by a young Coast Guard man, whom he kills - and thus earns the enmity of the entire US Coast Guard, but especially the murdered Guardsman's older brother who, together with his reporter-girlfriend and her comical photographer, vigorously sets to tracking him down and interfering with his plans to develop the city-melting gas in quantity. A Republic Serial in 12 Chapters.

The existence of the anti-Iraq coalition was threatened when Saddam targetted Israel. In order to keep Israel out of the war, and the coalition together the Scuds had to be stopped. SAS patrol Bravo Two Zero, under the command of Sgt. Andy McNab was tasked to destroy these weapons. Three of the SAS troopers were killed and four captured: Only one escaped - Cpl. Chris Ryan.

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

Reporter Brenda Starr (Joan Woodbury) and her photographer Chuck Allen (Syd Saylor) get involved in a search for the loot from a payroll robbery. Cliffhanging action and adventure and a fair amount of comic relief follow them at every turn.

From the Universal synopsis: Retired Inspector Blake of Scotland Yard learns that Lord Blanton has acquired the sacred "Love Ring"---a cursed jewel that has brought grief to its previous owners. Prince Darius seeks to obtain the ring, and the mummy of a princess of an ancient country to return them to his homeland.

A U.S. agent attempts to track down a spy ring working to destroy the Panama Canal.

When deadly terrorists strike, an FBI man, who is an expert on terrorist mentality, hunts their twisted "creator," who may be connected with a disgraced professor from his past.

Some dastardly criminals have stolen some top secret plans and tattoo them on the back of a woman so she can sell them to the highest bidder in Lisbon. This woman plans to take the place of a 'Sidney Royce', a legitimate traveler going to Lisbon as a reporter. Crossed signals allows the real Sidney to reach Portugal first, where she is pursued by those trying to obtain the plans and US government agents trying to prevent the sale.

FBI agent Bob Grayson works in collaboration with Max, a British agent posing as a fugitive German aviator. Meanwhile, fearless girl reporter Dallas Dayle is assigned by her editor to track down the enemy aviator and get an exclusive story. When she catches up with Grayson and Max, Dallas is under the impression that Grayson is a rival reporter and Max is the genuine fugitive.

OSS agent, working with the French underground, ambushes Nazi convoy with high-ranking general, who escapes. Later they take him from a Nazi prison and smuggle him to England.

Corporal Larry Grant and Sergeant "Mac" McGowan, of the United States Marine Corps, are rival for the love of Frances Schiller, but team up to hunt down "The Tiger Shark," a mad, scientific wizard who is holding Sergeant William Schiller, Frances' brother, a prisoner on a wild, jungle island in the Pacific.

A returning Korean War vet becomes embroiled in a fight over possession of a tungsten mine.

A 20 part 2-reel Western film serial.

In this espionage caper, a government spy must keep enemy agents from spying upon a defense plant. His work is made easier by his newest invention, a word scrambler which makes it difficult for the enemy agent.

Dave Kent, a commercial aviator, and his mechanic, Skeets Smith, are forced to make an emergency landing in Mexico and find themselves in the hands of La Panthera, a notorious bandit who wishes to overthrow the government and become president of a new republic. Manuel, his chief henchman, obliges them to collect the booty in a robbery, but Kent manages to meet María Valdez, a prisoner--held for marriage to the insurgent leader--who implores his aid. Kent and Skeets are arrested for the robbery and sentenced to death.

Crooks discover a Genghis Khan treasure ship on the Canada-Alaska border but the treasure is hidden somewhere on land. In their efforts to find the hidden treasure they resort to murder and sabotage to stop the construction of the Alcan highway which will bring homesteaders to the area. Sergeant Royal of the Royal Canadian Mounted Police battles through 12 episodes to find the crooks and to learn the identity of their mysterious leader known only as 'The Boss'.

A villain named Marlof attempts to set up secret missile bases inside Canada so he can launch missiles at the U.S. The Canadian Mounted Police dispatch agents to try to stop him.