Walter Winchell said the immigrants had come 6,000 miles. Since it's only 4,058 miles from Bremen, Germany, to Chippewa Lake, the immigrants must have taken some really roundabout detour through Canada.
Timeline Goof: The narration states that on February 16, 1929, Al Capone flew straight to Miami, and left Frank Nitti in charge of the Chicago operation. In actuality, Capone went to Miami prior to The Saint Valentine's Day Massacre. Nitti was in St. Louis, not Chicago, on February 16, 1929, getting married in a civil ceremony to second wife Anna Theresa Rango.
Goof: During the narration about The Saint Valentine's Day Massacre, seven hit-men with machine-guns are shown. At the actual event, only two machine-guns were used.
Goof: Rossman is mistakenly referred to as Rossi by the narrator in the scene where the Untouchables enter Francie's apartment searching for Dan Madikoff.
At the end of the episode, the fight scene between Smiley and Ray Quist uses some stunt doubles that don't look much like them.
Trivia: Because blanks can be dangerous, actor Don Gordon fires his gun to miss actor Harry Swoger, around his right knee,even though Harry grabs his chest.
Evidently, Patricia Neal couldn't sing a lick because Maggie Storm never warbles a note in this episode even though she's supposed to be a well-known nightclub singer. She appears on-stage and she spouts a few one-liners but Neal/Storm never sings.
End Credits: Beverly Powers is listed by her alternate name Beverly Hills.
There really was a death tree as depicted in this episode only it was located in Little Italy not Chicago's gypsy neighborhood. The blood-stained Genna brothers used to post the names of their intended victims on this tree.
Continuity: Even though the Blue Lion club is seen getting shot up on the inside, when the scene switches to the ouside, stock footage of the Club Mademoiselle is seen from The Rusty Heller Story episode.
Goof: Robert Bice, who played Capt. Jim Johnson in this episode, and a total of 17 times in this series, is listed as Capt. Dorset in the end credits.
The name of the murdered Federal agent is given as Arnold Wainwright in the narration but in the newspaper article being read by one of Nitti's boys his name is given as Arnold Weyrig.
Walter Winchell, in his narration, mistakenly refers to Georgiana Drake as "Georgiana Blake."
Walter Trager made a foolish decision to shoot it out with the Untouchables because he probably could have beaten the rap for killing Cully Grice. That one was clearly a case of either self-defense or justifiable homicide since Grice was attaching his silencer to his pistol in order to shoot Trager at the time he was shot.
Recycled: the filmclip stolen from episode # 16, The St. Louis Story, shows Bernard Fein (as Tim Harrington) getting chased down and shot on the run. He endured the same nightmare situation twice.
When Coombs fires twice at Halas, the first shot is clearly wide yet Halas grabs his abdomen area as if the bullet hit him.