Holt of the Secret Service

A master thief coincidentally is robbing a house where a murder—in which the President of the United States is involved—occurs in front of his eyes. H...

A secretary is found dead in a White House bathroom during an international crisis, and Detective Harlan Regis is in charge of the investigation. Desp...

Along with his new friends, a teenager who was arrested by the US Secret Service and banned from using a computer for writing a computer virus discove...

A police detective is caught up in a plot to steal two million dollars in bonds.

Government agents try to thwart smugglers, while some sort of plot unfolds, about a hidden treasure revealed by cursed coins.

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 treac...

A young girl journeys to Africa to find her father, an explorer who vanished in the jungle.

Beyond Hell's Gate Pass is territory controlled by a man who calls himself King Carter; he uses a variety of schemes to prevent the railroad from bein...

An Indian rug is the key to the location of a lost treasure. When the rug's owner is murdered, it becomes a case for Forest Ranger Steve King

The Phantom Rider helps Mary Grayson thwart a plot to steal her land.

The story of a boy, a dog, and a man. The boy discovers he is heir to a shipping line, and travels to Los Angeles, accompanied by inventor/radio ope...

Sergeant MacLane of the Mounties investigates the disruptive activities of a bunch of troublemakers.