Elliot Ness and his agents start to notice that all the big mob bosses are leaving town, which traditionally means that a big hit is about to take place. But Ness has no idea that he is the target.
Mob boss Jake Szabo is not happy with a young crook by the name of Pulaski. Even though he's been of use, the young man has the nasty habit of killing whoever he wants to, even Szabo's friends, and that has made the ganglord angry.
Narcotics are flooding into Chicago from the south so Eliot Ness decides to impersonate a recently killed jazz musician in order to find the source of the drugs in New Orleans.
As mob boss Frank Argos lays dying, a massive search is started for his long lost and estranged son to take over the business and inherit millions. Only it seems that the son apparently was killed in WWII.
Mob boss Ed Monte orders the death of his own son-in-law, only to find out too late that the threat to his life wasn't that simple.
When rival gangs go after the same bootleg alcohol, Ness attempts to use one gang against the other to grab the booze and the hoods, discovering that there is honor among thieves...sometimes.
Small time crook Johnny Mizo is wanted by everyone: his former crime boss from whom he embezzled $200,000; the Brazilian mob who wants the $200,000 or they'll kill him; his nephew who thinks half the money is his...and Eliot Ness.
A World War I hero organizes a sadistic ring of thugs to offer "protection" to the city's butchers from the mob.
One of Ness's men, a former criminal turned legit, is having trouble resisting the call of several million dollars, which would burn the man who gave him another chance.
It looks like Victor Salazar's time as a top hood is running out, especially since one of his boys is planning a double-cross and another of his henchmen is actually an undercover agent.
With alcohol legal again, the syndicate concentrates on illegal drugs and Ness and team take on the task of stopping the flow of the much wanted narcotics.
When a jazz club that only sells coffee gets pressure to sell illegal booze, then shot up when the owner refuses, Ness captures the shooter and goes after his boss.
Ginger Jake poisoning is at an all time high, with thousands afflicted from drinking the rotten alcohol. Ness sets out to break the back of the organization that is causing this disaster.
It was not always the big mobsters that sold hootch on the streets. Sometimes it was a one-bottle-at-a-time bootlegger like Jackson Parker who sold his wood alcohol on school campuses. But after many students got terribly ill or died, Eliot Ness must go after Parker and his new "partner" Nitti.
At a big meeting of the syndicate, Nitti tells the organization that because books brought Capone down, that they would no longer be writing anything down. But someone is not happy about this set up and tips Eliot Ness to the meeting, a chance to find all the top hoods in one place.moreless
The case of a body found in Lake Michigan being investigated by police Lt. Stewart and a million dollar shipment of illegal booze coming in from Canada begin to weave together for Eliot Ness and the local cop.
In order to put a crimp in Jake Guzik's monopoly of being the top booze supplier in Chicago, Eliot Ness goes into the supply business himself only to run afoul with District Attorney Beecher Asbury who reads Ness the riot act for "subverting the law to uphold it."
A gunfight in the street apparently was in reality a murder attempt on a passing Chicago newspaper reporter who tells Eliot Ness he was about to reveal things in an article that "would tear this town wide open."
After a career police officer is suspended for roughing up a mobster, he and his brothers decide to strike back at the mob and make a lot of money at the same time by kidnapping hood Tony Lamberto and holding him for ransom.
Eliot Ness and his men have Arnold "Spats" Vincent under surveillance at a horse race. They hope to close in on him as soon as he gets a piece of paper in hand which is a list with the names of officials in high places who are ready to do business with the crime cartel. But there are others who don't want that paper to fall into wrong hands.moreless
Eliot Ness never makes deals with hoods. But when a dying gangster makes a last request for Ness to find his missing daughter in exchange for all the information on his organization, Ness starts the search for the girl.
Right after the St. Valentine's Day Massacre, Eliot Ness and his men are scouring Chicago, looking for Bugs Moran. If Ness can get to Moran first, maybe he'll talk and he might just be mad enough to give them the information they need.
Unknown to him, the pets of a mobster's wife have infected both her and him, and are threatening all of Chicago unless Eliot Ness can find the mobster and arrest him for a drive-by shooting he ordered.
The rumor of an incriminating "book" causes a mob wanna-be to play a dangerous game with the syndicate and Eliot Ness.
It's 1932 and with 12 million people out of work, there's not much money to spend on booze which is causing the syndicate to come up with creative ways to make more money, like creating an artificial shortage of liquor to drive the prices even higher.
By mid-June 1932, Eliot Ness and the Untouchables have uncovered and shut down every champagne producing operation in the city. But now, four months later, champagne has appeared again in the fashionable Westside nightclubs, forcing Ness into raids again.
Joe Lassiter is known as the greatest inside man in the bootlegging racket. He and his sidekick, Nick Karabinos, have just arrived in Chicago by train, traveling 1,000 miles with one mission: build an Eliot Ness-proof brewery.
An old acquaintance of Eliot Ness is shot dead while performing as Santa Claus for children. Ness won't stop until Hap Levinson's killer is found, even if it means calling in the team on Christmas Eve.