Once again The Untouchables threw history to the wind in creating this episode for Robert Stack and his team. Johnny Torrio who after surviving a gangland hit, retired and turned it all over to his chief lieutenant Al Capone. He never returned to Chicago, simply became an underworld elder statesman.
But here Charles McGraw does come back when during an investigation of the syndicate getting legal grain alcohol from an upstate New York firm McGraw's nephew is killed. He blames the president and chief accountant of the firm Edward Andrews and Henry Jones for the death.
Torrio has something on both these guys and he's been getting his alcohol for his product and squeezing them for years. What it is is the heart of this Untouchables episode. It's Nicholas Georgiade of the team that uncovers it.