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.

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'.

Two federal agents battle a gang that hijacks trucks carrying materials vital for the security of the country and sells them to foreign powers.

The war lords of a potential enemy of the US has the spy ring, led by John Baroda, the Spy King and his aide Nitra, sabotaging the plans for a vast defense system of radar stations along the American borders. Radar Defense Bureau operative Chris Calvert comes to the rescue of a brilliant radar scientist, Joan Hughes, who has been kidnapped by Baroda henchmen in chapter 1 ("The Fatal Fog"), and the two battle together before putting an end to the Spy King in the aptly-named chapter 12, "Day of Reckoning".

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.

When a pirate family's arrival shakes up a coastal town, the kids next door offer to help them blend in and fight a bitter rival.

Harry Steele (Charlton Heston) is a tourist guide determined to make his fortune by finding the Sunburst, an Inca treasure.

An American insurance investigator is sent to Rhodesia to investigate the mysterious death of a diamond broker who drowned whilst diving off the coast. The broker was insured for $1 million so the insurers are suspicious.

New York City cop Phil Donlon leaves the force to join the U.S. Olympic team. When he falls for a Marine colonel's daughter he gets kicked off the team. Joining the Marines to win the Colonel's approval many adventures follow.

Lancelot is King Arthur's most valued Knight of the Round Table and a paragon of courage and virtue. Things change, however, when he falls in love with Queen Guinevere.

It is 1865 and Union prisoners use a military balloon to escape a Southern prison camp near the end of the Civil War. The balloon drifts for days and finally lands on a mysterious volcanic island with very unusual inhabitants. Also landing, in a better aircraft, is Rulu, a visitor from Mercury. She seeks a radio-active material that will enable her to manufacture an explosive that will destroy the world or, at least, the portion known as Earth in this 15 Chapter Serial from the 1950s.

A team of Navy Seals are sent to destroy a disabled submarine so it will not fall into the "wrong" hands. They complete their mission, but are captured before they can return to their base. The U.S. Government will not mount a rescue mission to free the soldiers, so their teenage children take over. The kids find a way to venture into the foreign country and then must overcome many obstacles.