Wayne Hollister, a Florida fisherman, is approached by a Mr. Meyers who rents his boat for one day and demands to be taken to the waters off Cape Canaveral, not to fish, but to watch a rocket launching.

Fred Lang, an enemy agent, works as an engineer on a missile base in Los Angeles. He learns that a group of scientists is scheduled to fly to Cape Canaveral and is ordered to place a bomb on the plane.

Commander Matson enters Czechoslovakia disguised as an art dealer, part of a plan to get atomic scientist Andrew Fleming out of the country. Tension mounts as the time of Fleming's trial nears and Matson has to call upon a group of Czech resistance fighters for help.

Jessica Tabor overhears a plot to assassinate King Hussein of Jordan and turns to secret agents James Foster and Harry Shaw to help forward information to Jordan and put the King out of danger.

This episode tells of an American secret operative (Sheldon Lawrence) who uncovers a plot to assassinate Marshal Tito and is warned to beware of a sculptress (Jeanette Strike.).