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S1 • E1
A beautiful blonde plays off one member of a gang of diamond thieves against another in an attempt to steal two million dollars in gems for herself.

S1 • E2
Johnny suspect an old army friend is behind the commando style raid on the London Diamond Exchange.

S1 • E3
King must guard a cache of diamonds.

S1 • E4
A beautiful woman and her henchman try to smuggle a sack of diamonds out of the country.

S1 • E5
In order to trap a gang of South African diamond smugglers, Casey agrees to pose as one of the criminals.

S1 • E6
The Illegal Diamond Buyers, a criminal cartel, plot to cause a massive drop in the price of diamonds on the world market.

S1 • E7
Diamond thieves in four different countries stage successful prison breaks.

S1 • E8
King suspects the owner of a tramp steamer may be smuggling diamonds in crates of tuna.

S1 • E9
King poses as a oil tycoon to investigate a tip about a new gang of diamond smugglers

S1 • E10
Johnny King's efforts to end diamond smuggling are so effective that the crooks decide to eliminate him.

S1 • E11
King learns that the chief of Havana's police is stealing diamonds from the victims of his firing squads.

S1 • E12
King and O'Brien travel to the Orient in pursuit of a napkin ring encrusted with jewels.

S1 • E13
King and O'Brien recover a cache of stolen gems, but the crooks plan to strike regain their ill-gotten goods.

S1 • E14
During the confusion following a train wreck, a diamond thief makes a bid to steal diamonds from a courier's possession.

S1 • E15
Suspecting his wife is having an affair with one of his employees, a diamond dealer asks the young man to deliver a valuable gem and then tells the police that the diamond has been stolen.

S1 • E16
While on an airplane, a courier is robbed of a fortune in diamonds. He raises an alarm, not realizing the thief has tossed the briefcase full of gems from the plane to his awaiting accomplice on the ground.

S1 • E17
King's ex-girlfriend, a jewel thief, considers returning to a life of crime.

S1 • E18
Diamond smugglers use an unsuspecting magician to carry illegal gems from one location to another.

S1 • E19

S1 • E20

S1 • E21
King tries to learn which of four freighters is carrying a cache of uncut diamonds.

S1 • E22
Many years after World War II, two former servicemen have a falling out over the German crown jewels that they stole during the waning days of World War II. One man, a local politician wants to return the gems, but the other wants to sell the diamonds to the highest bidder. With the help of a beautiful but shifty French smuggler, King and Casey attempt to recover the gems before they disappear.

S1 • E23
King helps three men escape from the Congo when a revolt in the diamond fields breaks out.

S1 • E24
A friend of King's joins the criminal syndicate controlling criminal activity in the diamond industry

S1 • E25
An employee concocts a scheme to steal jewels from his elderly female employer.

S1 • E26
A employee uses his employer's trust to steal a small fortune in industrial diamonds.

S1 • E27
King and O'Brien seeks the help of a hip, young British singer to trap a criminal gang.

S1 • E28

S1 • E29
A member of a criminal syndicate develops a unique method to steal diamond jewelry.

S1 • E30
While touring New York City, a group of West Point cadets get mixed up in a diamond robbery.

S1 • E31
A clown supplements his meager income with petty thefts.

S1 • E32
A criminal is released from prison after serving a fifteen year sentence.

S1 • E33
A successful jewel thief moves to the United States and brings along a pretty confederate to distract King and O'Brien.

S1 • E34
A crook salts a worthless piece of desert real estate with diamonds and tries to con greedy investors into buying the land.

S1 • E35
Two hoodlums pursue a burned-out musician who found a cache of stolen gems

S1 • E36
When a priceless diamond is stolen, two juvenile delinquents are King's only leads to locating the stolen gem.

S1 • E37
King investigates a Burmese man who is sponsoring a beauty contest in Miami Beach

S1 • E38
King investigates a man's claim to have invented an inexpensive way to manufacture synthetic diamonds.

John King

Al Casey
Jo

Cliff Hale

Andre Goulet

Inspector Andrews

Sam Hall

Caldwell

Dr. Scott

Massis