After reporter Pat Allen is killed at the Daily Sentinel by a leopard, Britt Reid finds a transmitter in a cigarette box. Later, D.A. Scanlon informs Britt of the discovery of a perfect diamond on Allen's desk. Digging around, Reid discovers that the gemologist had been working on producing synthetic diamonds.

A scientist predicts crimes with a computer that implicates the Green Hornet.

Private Investigator Nat Pyle informs Brit that he has proof, for a story, that presumed dead racketeer Glen Connors, is still alive. Shortly later, Nat is found floating dead in the harbor from a possible boating accident. The Green Hornet thinks otherwise and finds a special interest, because..... Glen Connors framed the Green Hornet's real father.

An illegal bootleg liquor ring devised by Dirk forces a stronghold on bars in the town to buy from them. As reporter Mike tries to follow a lead to the racketeers, he becomes kidnapped. Don't look up or you'll spot Dirk in his helicopter dropping bombs on his non-conformants, his preferred method.

Seems that wealthy and prominent members of the community have been executing crimes and then forgetting that they ever happened. Eventually the District Attorney and The Green Hornet find that Peter Eden, owner of the Vale of Eden, has been leaving ""suggestions"" in these people's subconscious dreams after receiving treatments from the Vale of Eden.

Part two picks up with a GREEN HORNET visit and proposition for Peter Eden, owner of the Vale of Eden. After Peter uses Vanessa Vane to double-cross the Hornet, the Hornet re-visits Peter and uses his own dream machine on Peter to foil the last crime for the evening.

A charity art auction of fine paintings at Britt Reid's home is interrupted on live television by three masked, gun toting criminals. The police, nearby, manage to wound one of the thieves, but before they can arrest the other two, a laser ray is unleashed on their squad car with devastating results. The Green Hornet and Kato find themselves in quite a confrontation against this roving killing machine.

Organized crime's ""Protection"" Boss Duke Slate decides it's time to acquire the oriental businesses in town and uses Low Sing's gang to handle his influence. Low Sing, a martial arts professional, instructs his craft to his gang using the actions of a caged Preying Mantis, analogizing its intricate moves to proper Kung-Fu application. After a kidnapping, engineered by Low Sing, a challenge between Low Sing & Kato results in an interesting result.

Big game hunters are using mobsters as quarry but their next target may be their most dangerous game yet, the Green Hornet.

After a rash of wealthy homes are burglarized, Reporter Mike Axford becomes so suspicious he places himself at the next possible home to be targeted, only to find himself being arrested, behind bars, for suspicion of murder.

""The Sally Bell"" a cargo ship with $2 million in narcotics en route to the U.S. from Hong Kong, is initially lost with her crew at sea, now mysteriously shows up at a salvage yard. The only survivor, Gus Wander, knows ""The Secret"" of her special cargo with only one big problem -- he's currently unconscious.

Britt Reid orders Mike Axford to team up with the Green Hornet to uncover the ringleader in a insurance scam. Mike reluctantly agrees, but later tries to expose the ringleader alone, leaving it up to the Green Hornet & Kato to save him before it is too late.

Its election time again and District Attorney Scanlon is running although someone wants to permanently remove him from the ballot.

An arsonist wreaks havoc setting fire to buildings at the stroke of midnight. The Green Hornet and the District Attorney work behind the scenes to aid the Commissioner to put a stop to this HOT situation. Throughout the arsonist's reign, Reporter Mike is kidnapped.

A tank crew who served together in Korea steal a tank to free their former captain from prison before he is executed for murder. It's up to The Green Hornet & Kato to stop them before they can accomplish their goal.

As a carbon copy of the Green Hornet's Black Beauty attacks a Daily Sentinel delivery truck and terminates it's driver right in front of Britt Reid -- and Reporter Mike has an explosive visit from a Green Hornet impostor, leads the real Hornet on a cat and mouse chase of his shadow car disrupting Sentinel deliveries.

After another death, Simon Neal, publisher/owner of the Daily Express, by the phony Green Hornet, part 2 begins with Britt Reid bringing on-board Daily Express's previous employee, Dan Scully, to help investigate Simon's termination. After finding out from Sabrina Bradley, Managing Editor of the Daily Express, that a copy Black Beauty was produced for the Press Club's Masquerade Ball, the real Green Hornet sets a trap with her help.

The Green Hornet uses Mike Axford in a plan to get mobsters Phil Trager & Steve Gant to take each other out. But when Axford shows up when he isn't expected to, the plan may fail and cost him, the Green Hornet, and Kato their lives.

Britt Reid must figure out how to get medical attention for a wound he received as the Green Hornet and stop two cops who are using silent alarm calls for their own profit.

After the Green Hornet prevents the assassination of a Prince Rafil, his blonde American fiancé, Janet Prescott is kidnapped and the prince is ordered to abdicate in order to save her.

When a wax figure of The Scarf, an infamous strangler from 15 years ago, is replaced by figures of the Green Hornet & Kato, the figure seemingly comes to life and starts attacking people. Using a manuscript about the Scarf, the Green Hornet & Kato attempt to snare the killer before he claims any more victims.

As a surprise birthday party begins for Britt, a gift gun given as a present to Britt, seemingly shoots by itself fatally terminating ex-employee Eddie Rech, almost puts Britt in jail.

The arrival of visitors from outer space seemingly coincides with an Air Force convoy transporting top secret electronic equipment and an H-Bomb missile warhead. Having Britt's secretary Casey taken hostage makes the situation very touchy.

Part 2 begins with the Green Hornet using his tracking signal to close in on the visitors from Outer Space and their mystery.