In San Francisco, professional football quarter back Paul Talbot is the target of an extortion scheme. The extortionist breaks into Talbot's home to demonstrate he's capable of harming the athlete's family. The FBI, under the supervision of Erskine and Colby, keeps watch as Talbot drops off the extortion money. But Talbot interrupts the bureau's surveillance, punching out the accomplice of the extortionist. The criminal vows to kill Talbot while he's playing in the championship game.
A young woman is kidnapped in Colorado. Her adoptive parents, however, are not wealthy so there isn't an obvious motive for the FBI in its investigation. As Erskine and Colby's investigation proceeds, it emerges the woman's biological father was involved in the theft of $400,000. The kidnap victim was only eight years old at the time. The trauma involved caused her to shut out memories of the incident. The kidnappers bring her to a national forest in Utah, trying to make her remember where the money is hidden.
"Doc" Lacy, a legendary criminal, has been incarcerated for 27 years. A gang arranges for Lacy to escape from a Louisiana prison farm. The gang wants Lacy to plot a robbery of a million-dollar Army payroll in Washington state. The infirm Lacy, who has a weak heart, also wants to see his estranged son and wife before the robbery. Erskine and Colby lead the FBI's manhunt. Despite his advancing years, Lacy is quite dangerous who's not afraid to kill if he has to do so.
A con man poses as a psychic to bilk rich people. One of his victims spots the criminal pocketing jewels and realizes he has been had. But the criminal gets away and crosses state lines, bringing the FBI into the case. As Erskine and Colby begin their investigation, the con man has a new target: one of the richest women in Connecticut, who lost a son a year earlier.
The youngest son of a millionaire rancher is kidnapped. As Erskine's investigation unfolds, it becomes apparent there's more to the case than appears. The truth evokes Cain and Abel and involves multiple double crosses. With time running out, Erskine races to solve the case.
In Louisville, Kentucky, a team of four men robs an amusement park of more than $1.8 million. But the mastermind of the plot double crosses the others and gets away with all the money. Now, the three robbers and the FBI are after the same man. Erskine and Colby follow a trail from Louisville to Cincinnati to St. Louis as the investigation unfolds. Meanwhile, the man who planned the robbery returns to his home in San Diego, his wife unaware of the double life her husband has been living. The bureau apprehends one of the robbers in St. Louis, the first major break in ...
One member of a gang that robbed more than $1.8 million has been arrested in St. Louis. Under questioning from Erskine and Colby, he reveals the names of two other members of the gang but says he doesn't know the identity of the mastermind behind the holdup. The gang only knew him as "the salesman." The FBI apprehends another gang member in St. Louis. Meanwhile, the last member has figured out "the salesman" is in San Diego. The FBI, under Erskine's direction, also now seeks the mastermind in San Diego. The question is who will reach "the salesman" first.
In Boston, a Communist spy ring is after top secret plans of a defense contractor. A scientist employed by the company has stolen part of the plans for $5,000. But he attempts to blackmail the spy ring's leader for another $5,000 to supply the key plans of the project. Luther Shawn, the ring leader, calls his bluff and has his Rottweiler attack, nearly killing the scientist. The spy ring's No. 2 man now attempts to seduce a lonely administrative assistant who has access to the plans. The FBI, led by Erskine and Colby, is assigned to the case after messages from a ...
At a boarding school in Arizona, the son of a rich businessman in Denver has become friends with two other boys. But the boys, member of the school's cross country team, imprison the businessman's son in an abandoned underground chamber that had been used to store explosives. Erskine and Colby head up the FBI's investigation. The Denver businessman, ignoring the bureau's advice, decides to pay the $25,000 ransom. The FBI begins to put the pieces together. But the underground chamber is about to be buried as part of a construction project. The question is whether the ...
Thieves execute a daring jewel robbery in downtown St. Louis and flee across the state line to Illinois. There, a helicopter awaits to take them to safety. This brings the FBI into the case, with Erskine and Colby heading up the investigation. The thieves turn the stole jewels over to a fence. The helicopter pilot isn't satisfied with his share and takes more. The thieves have another job lined up and need a new pilot. They select a man who's down on his luck and growing desperate.
An employee of the Bureau of Indian Affairs is in a coma after an attack at a hard-luck mine called Superstition Rock. Because a federal employee is involved, the FBI is called into the case immediately. There have been a series of incidents at the mine that have spooked the American Indian employees. They believe the incidents indicate the mine is near an Indian burial ground. While Erskine supervises the bureau's investigation, Colby goes undercover as an ex-con who is now a new mine employee. The investigation turns up a conspiracy intended to force a sale of the ...
A Communist sleeper agent in New York has just been activated. The sleeper is known to the FBI and is being watched. But shortly after being activated, the agent has a heart attack. Erskine goes undercover, assuming the man's identity. His target is an operative known as Minerva, who is operating out of Pittsburgh. But the assignment has more than the normal risk. There's a power struggle under way among the spy ring. Minerva has recorded a set of tapes that he believes will be his "insurance policy." For Erskine and the bureau, those tapes are an opportunity to gain ...
The mob makes a move to infiltrate fisherman fleets on the U.S. West Coast. Erskine spearheads the FBI's investigation and Special Agent Colby goes undercover as a fisherman. The mob has gotten to a respected leader among the fishermen -- getting him to accept a loan before canceling it. Colby's life will be imperiled as the bureau's investigation proceeds.
A criminal conducts a bank robbery in Lincoln, Nebraska. The robbery nets $12,000 but is only a preliminary job. The criminal's next job involves robbing a New York City department store. To do that, he'll recruit a team while also romancing a woman he met a few months earlier. Erskine and Colby move across multiple states while on the criminal's trail.
In Chicago, a shipment of platinum from O'Hare International Airport. The three thieves are to meet in San Francisco with a buyer from Europe. The FBI manages to intercept the buyer ahead of the gathering. Erskine goes undercover, taking the buyer's place. Meanwhile, the thieves have found another fence, this one in Denver, who is willing to pay more. The thieves plan to kill Erskine, take the money he has and consummate a deal with the Denver fence.
In Portland, a city commissioner who was actively involved in the fight against organized crime nearly dies in a murder attempt. The hitman is also injured and flees to California. Crossing a state line brings the FBI into the case and the bureau's investigation is supervised by Erskine and Colby. The hitman ends up in San Francisco, where he and a young pregnant woman fall in love. The FBI foils a second murder attempt on the commissioner. Now, the first hitman is marked for murder for failing to kill the commissioner. and his girlfriend is also endangered.
A married couple robs a Norfolk, Virginia, bank of $27,000. Problem: They have stolen freshly minted bills not yet put into circulation and easily traceable. The FBI, led by Erskine and Colby, is on the case. The couple moves to fence the stolen money. But there's a rift. She has developed a taste for the high life and wants to take more risks. Now, she's prodding her husband to take part in a bigger heist.
Erskine and Colby lead the FBI's investigation into organized crime's infiltration of popular music acts. The case begins when the manager of an up-and-coming singer is beaten brutally in Indianapolis. The singer thinks he can buy his way out of his contract. But it turns out the interest payments are so steep the singer can't buy his way out at any price.
A high-ranking scientist at a major company is part of a Communist spy ring. He is about to turn over notes from a top-secret project. Then he discovers his wife has left home. That's a blow to the ego of the scientist, and he goes off looking for her. Meanwhile, the FBI has already arrested one of the scientist's confederates. Now both the bureau, led by Erskine and Colby, and the Communist agents are in a race to reach the scientist first.
James and Patricia Laner are in serious trouble. He is an unsuccessful architect who is addicted to heroin. She works at a Chicago brokerage house who has resorted to stealing stock so the couple doesn't drown in their financial troubles. A theft goes awry when a member of the operation is arrested in Cleveland. Because stolen property was transported across state lines, the FBI is now involved. Erskine goes undercover in the Chicago brokerage house. Now, James Laner is being cut off from his heroin supply to force his wife to steal again.
Erskine and Colby criss-cross the country as they seek a gang of bank robbers led by Larry Kulhane. In Nebraska, two police officers have been injured trying to apprehend the gang. That's where the trail begins for Erkine, who will travel to Seattle, Atlanta and Charleston, South Carolina, during the investigation. Kulhane's ultimate target is Ardyth Nolan, a wealthy, strong-willed older woman, who has more than $200,000 in her home after liquidating some investments. Kulhane has one man in the Nolan home as the new butler. Another one of his men has gotten friendly ...
Logan kidnaps Hale, the man who put him out of business. Logan is demanding a $250,000 ransom from Hale's grown children. What Logan doesn't know is that Hale has suffered his own business reversals. Hale's bank will only loan $70,000 of the ransom. While Erskine and Colby head up the FBI's investigation, Hale's son -- who has always felt inferior to his father -- must deal with the ransom demand and take charge of the situation.
Erskine and Colby pursue Dree Victor Foster, the "corruptor" of the title, from Pennsylvania to Arizona. Foster's ultimate goal is to free his younger brother, who's about to be sentenced for murder. Along the way, three runaway teenage boys fall under Foster's sway. Foster, whose crimes include murder, has illegally purchased multiple guns and hand grenades.
Jean Scott commits a series of robberies while simultaneously seeking the whereabouts of her son, who is living with her ex-husband. She is a consummate actress, able to trick and con her victims before robbing them. Jean also can manipulate male accomplices. Erskine and Colby gradually track her to Nebraska, where her son is now living. But the son rejects her and Jean's latest accomplice decides to leave her as well. When Erskine finally reaches her, he finds Jean has snapped emotionally.
Jason and Laurie Peale are a father-and-daughter con artist team. Jason is adept as playing the role of a rich big shot to entice his targets. After getting away with one scam, they now travel to Arizona for their biggest con yet. The FBI, led by Erskine and Colby is on their trail. Meanwhile, Jason has made a mistake. He cons the owner of a jewelry store out of a $15,000 ring. The store owner, as it turns out, is in debt to a loan shark. The loan shark knows Jason is a con man - and intends to use him for his own purposes.
In New England, two convicts stage a prison escape and cross over state lines into Maine. One of them had been scheduled to testify in a major criminal case. They force their way into a home occupied by a widow and her young son. Erskine and Colby lead the FBI's manhunt. Meanwhile, the prisoner who had been scheduled to testify is also being sought by criminals who want him silenced.