Holt of the Secret Service

A mysterious spacecraft captures Russian and American space capsules and brings the two superpowers to the brink of war. James Bond investigates the...

Cool government operative James Bond searches for a stolen invention that can turn the sun's heat into a destructive weapon. He soon crosses paths...

A deranged media mogul is staging international incidents to pit the world's superpowers against each other. Now James Bond must take on this evil...

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

Calvin Drake employs a group of low-lifes to drive away land owners along the path of a new railroad; Red Ryder opposes this strategy.

The obsessive scientist Dr. Miller is working on a matter-transmitter invention called the Paratron; a conspiratorial team of spies and no-goods...

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...

A lady reporter and two college students search for the "Gold Special," a train that disappeared without a trace.

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...

Irrepressible Helen Rhinelander, the daughter of a railroad president. A dastardly villain, Segrue, however, desires not only Helen but also the...

Prospector Henry Tolliver disappears and his son "Wild Bill" Tolliver comes looking for him.

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...