Burlesque theater owner Nate Kester branches into bootlegging liquor, but has to "eliminate" a legitimate cognac maker so he can pass off his own inferior brand to the public. However, the dead man's wife, former burlesque dancer Marcie McKuen, refuses to help Ness because she has plans of her own to "take care of" Kester.moreless
Nick Acropolis manages a numbers racket for Frank Nitti, but discovers that his wife Stella's brother Louis is embezzling from him. While he deals with Louis and tries to protect himself from Nitti, Nick discovers that his hired gunsel Frankie has plans to move up in the world...and those plans don't include Nick.moreless
Bottle manufacturer Edmund Wald teams up with a bootleg distributor, Michael Viton, to set up a champagne distribution network, and has his cheapskate Uncle Loomis put up the funds. While Eliot Ness tries to shut down the operation, the three partners have plans to take each other out and be the one left standing with the money.moreless
When Al Capone goes to jail, Frank Nitti and Jake "Greasy Thumb" Guzik vie for control of the Organization. When they're unable to settle their differences, Capone calls in a "consultant": Kafka, to make them work together. Eliot Ness has to stop Kafka from crossing the Canadian border and uniting the warring factions.moreless
Nero Rankin is elected chairman of the Syndicate, but there are mobsters who aren't happy with his appointment. When Eliot Ness launches a national campaign against speakeasies, Rankin strikes back by ordering his men to gun down pedestrians and turn the public against Ness.
Eliot Ness goes after Frank Makouris, a mobster who controls the New York fish market business. In return, Makouris goes after Ness and the Syndicate sets up one of Frank's hoods, Lenny Shore, to take the blame. Only Lenny survives and decides to get revenge.
Twenty-year-old Johnny Lubin is looking to expand his opium distribution network and make a fortune by teaming up with a reformed mobster, George Dodd, who now works as a toymaker.
Melanthos Moon, San Francisco art dealer, puts together a scheme to make a near-perfect money plate, use stolen U.S. Government money paper to create counterfeit bills, and then cut a deal with Nitti to distribute it.
After boxing manager Barney Jarreau's newest boxer, Joey McGrath, dies, Barney wants to go to the State Athletic Commission. However, mobster Johnny Acropolis threatens to kill Barney's wife unless the manager keeps his mouth shut.
Eliot Ness and The Untouchables go after political kingmaker Bryan O'Malley and find two witnesses who can testify against him. However, police protection is anything but a sure thing when O'Malley has a crooked cop named Drexel in his pocket.
As the end of Prohibition looms on the horizon, the Mafia shifts toward the sale of narcotics, with Eliot Ness flying to New Orleans where a major deal is about to take place.
Ness and team go to work after millionaire building contractor Thomas B. Randall is kidnapped and held for ransom by notorious gangster Lily Dallas.
Chemists working for the top crime boss try to find a way of re-naturing the legal de-natured alcohol that the government chemists say is unusable for booze. Ness and his team track the legal stuff hoping to find the source of the illegal and now expensive booze.
With Capone convicted of income tax evasion, District Attorney Asbury heads to Washington to try and get a federal anti-racketeering bill passed before Congress.
Eliot Ness heads to the New Jersey docks to serve an arrest warrant on rackets man Valentine Ferrar, who is coming in on a cruise ship from Cuba. Only the ship has caught fire and Ferrar is missing, allegedly having drown after jumping overboard.
Eliot Ness and his agents have closed down most of Chicago's big illegal booze operations. But the mob isn't done yet, forcing thousands of poor immigrants to make hootch in small stills, one gallon at a time. Ness has to figure out how to handle what seems like an impossible task.moreless
Aiming to stop the bloodshed before it starts, Ness tracks an illegal shipment of "Ginger Jack" rotgut that is about to get hijacked by a rival crime boss.
With Al Capone in prison, other top crime bosses gather in a clandestine meeting in Chicago to plan on who will take over the syndicate, with Eliot Ness dangerously in the middle of negotiations.
Ness continues to battle the now split-in-two empire of Al Capone and it's respective crime bosses, an attack on a local newspaper's editor, and the manufacture of illegal silencers for guns.
"The Big Train" is about to disembark on a journey across country, carrying notorious gangster Al Capone on his way to serve time on "The Rock" in San Francisco Bay. Only Ness has learned of a plan to "rescue" Capone from the train and fly him to freedom.
Three years after Ness suggests to the government that a prison for the most notorious criminals needs to be built, Alcatraz is ready to house its first hoods, the most notable being Al Capone. Only Capone doesn't have any plans of every getting from federal prison in Atlanta to "The Rock."moreless
Eliot Ness must find out who is really responsible for the robbery of a million dollars worth of negotiable securities from a U.S. mail train, where a postal clerk was shot.
Ness hits repeated setbacks as he tries to close down Otto Frick's traveling carnival, which is really just a front for moving illegal drugs around the country.
Ness and his team of agents travel to New York where mobster Larry Fay has taken over the milk business, jacking up the cost two cents per quart, and blowing up any establishment that doesn't want to pay his price.
Ness and company have set up a roadblock just south of the Canadian border with intentions of intercepting a convoy of trucks carrying 1,000 cases of Canadian Scotch. Only the trucks never reach Ness, having been hijacked by rival gangster Phil Corbin.
Ness is hit with a new racket by the Purple Gang: they kidnap other thugs and hold them for ransom. Since mobsters won't go to the police for help, they pay...and it's paying off big-time.
Even though Eliot Ness and his men have stemmed the supply of narcotics coming into the Windy City from Asia and southern Europe, the underworld is using new ways to supply the city's 5,000 dope addicts with their fix including robbing drugstores, doctors' offices, and wholesale drug houses.
Even though Eliot Ness has closed down the big drug operators, the mob has come back with a vengeance by using a large network of small time independent pushers. Ness goes to work amid the public cries to do something and do it quickly.
Mob boss Waxey Gordon is waging a gang war to eliminate rival gangsters for control of the New Jersey beer market, which brings Ness and his agents into what could turn to bloodshed in the streets if it's not stopped.
Gus Marco, legitimate businessman by day, has come up with a profitable sideline by night: he stills legal denatured government alcohol replacing it with water. This brings Ness and the boys into action.
Mobster Jack Diamond is drawing heat from his fellow gang leaders because of publicity his open lifestyle is bringing to the mafia. They order him to stop and take a vacation and Ness uses this opportunity to go send in someone undercover and find out the source of the mob's narcotics.moreless
With Capone's empire tottering, a big-time gangster from New York, Charlie "Pops" Felcher, has just arrived in Chicago to take over.