Kelly and Scotty are assigned to beautiful Palm Springs to vet a beautiful defector with some truly interesting secrets. A wonderful setting for a budding romance with Kelly if only the bad guys would stop shooting at her.
Members of an elite nuclear test detection team have died violent deaths one by one. When the fifth team member is killed right before Scotty's and Kelly's eyes, they are assigned to protect the sole surviving member and find the killer. The prime suspect is the seventh man who washed out of the team and happens to be a friend of Scotty. Scotty tries to reach him though his sister, a singer performing in Las Vegas. But gaining her cooperation will require more than persuasion. It will require a carefully conceived trap.
On vacation in Italy our duo happens upon a girl Scotty was sponsoring over the years. Now full grown she is preparing to marry. Scotty soon learns he may be able to handle enemy spies, but his foster daughter, her fiancé; and the Italian traffic court are entirely different matters.
A local family in Italy kidnaps Kelly with the intention of holding court over him for the death of their favorite son in the Korean War. Once again Scotty's investigation and recovery skills prove lacking in his efforts to rescue Kelly. Maybe he'll have more luck as his lawyer.
Kelly and Alexander are charged with apprehending the mastermind of a scheme to turn city-wide power outages into a marketable commodity. Two complications; Alexander has little confidence in his aide and cover identity, an agent with little field experience posing with her son as his wife, and his only link to the schemer is a psychopath.
Alexander and Kelly receive the unenviable assignment of guarding a spoiled, teenage king. But it gives Alexander the opportunity to teach the future leader a lesson or two in maturity if he survives his assassination attempts.
Kelly and Alexander are abducted and impersonated by two enemy agents. Their intent; to get close to a defense contractor, kidnap his daughter and force him to turn over secret weapons designs. As Kelly's and Alexander's escape attempts continue to go awry one wonders if they are up to rescuing the fair maiden.
A beautiful tour guide, a handsome tennis pro and the romantic city of Venice would make for an intimate friendship if the tour guide didn't like to slip knives between men's ribs. As American agents drop like flies is Kelly safe?
Kelly and Alexander are sent to a little town in Italy to recover the payload from a nuclear armed aircraft that crashed nearby. They soon find that the towns folk found the plane rather useful. A few people even thought the bomb might come in handy.
An incompetent thief pursues a beautiful woman returning a priceless painting to Florence. Kelly and Alexander are assigned to provide clandestine security. Of course when a beautiful woman is involved Kelly is not one to hide in the shadows.
With the help of Kelly and Alexander the Da Vinci Madonna was delivered to its new home in Florence. But alas, the previous owner reports it is a forgery. Where did our boys go wrong? Now they have to track down the thieves, recover the painting then steal the forgery and replace it with the real painting.
In order to gain attention from a father absorbed in his high-level engineering work, thirteen-year-old Alan steals from him an electronic prototype essential to the country's security and runs away with it.
Some heroes are motivated by duty. Others just want to impress their father. Whatever the reason, Alex and Kelly receive one of their dirtiest assignments; to train a young rocket scientist to resist torture and then to rescue him when he's captured.
Kelly and Alexander's assignment is to find a list of Nazi war criminals before the war criminals find it. The agents discover there is no list. A little girl has memorized the names of the Nazi war criminals.
In Europe, Kelly and Scott investigate an actor who is also a spy. The actor dominates his mistress, Temple. While Kelly gets to know Temple, Scott is captured and interrogated. When Temple discovers the truth, her life and Scott's are endangered. When Temple calls Kelly to suddenly break off their developing relationship, Kelly realizes he must take action quickly.
When the daughter of a powerful British arms producer is kidnapped, Kelly, who naturally had a romantic relationship with her, immediately suspects a hoax. When her father insists on paying the ransom and rescuing her, whether she wants to be rescued or not, Alexander and Kelly get the job. However, the fading warlord who is holding her is privy to all their plans and turns out to be as philosophical as he is ruthless making him most unpredictable.
Recovering from his torture at the hands of enemy agents, Kelly Robinson travels with Scotty to Spain's Costa del Sol for a 30-day vacation. There he's pleased to meet old friend Lindy but reminders of his recent ordeal seem to lend credence to a psychologist's judgment that he's no longer the man he once was. The enemy agents now reappear, kidnap Kelly at gunpoint, and once more try to torture from him details of a top-secret metallurgical process. Scotty arrives and puts a stop to the torture by giving a written copy of the process to the agents. Having successfully...
On vacation (again?) Scotty and Kelly bump into one of their not-so-fond acquaintances, a British agent they've found thoroughly untrustworthy. Unfortunately, orders are to find out what he's up to rather than shoot him. Suprisingly, it has something to do with rescuing a poor old art lover who refuses to disclose a secret he seems to consider worth dying for.
When Kelly wakes up with with a dead Russian ballerina in his bed and no memory of how she got there, Russian intelligence presumes Kelly murdered her. The Russians plan to report Kelly to the Spanish police unless, with Scotty's help, he can prove the murder was committed by someone else.
Scott and Robinson are assigned the impossible job of keeping a particularly ornery touring comedian from embarrassing the United States. A Soviet agent along for the ride is assigned to encourage trouble. When the comedian's assistants start dying, our duo and the Russian begin a perverse version of "Old Maid", perhaps better named "Who will get caught with the dead girl."
Herbie is a man with a terrible headache, several in fact. You see he used to be a filing clerk privy to many of America's nuclear secrets. But he resigned and is now being courted by a beautiful enemy agent. The best way our favorite counter-spies could find to keep him out of her clutches is a series of concussions.