As of the date of its release, the pilot episode is the most expensive pilot for a TV show ever produced.
Real life gangster Arnold Rothstein would later be immortalized in F. Scott Fitzgerald's famous novel 'The Great Gatsby' where Gatsby introduces the narrator, Nick, to a friend and business associate of his called Meyer Wolfsheim, a Jewish gangster and gambler who had 'fixed the World Series,' a roman a clef for Rothstein, who did in real life.
According to Shea Whigham an unexpected perk was that real gourmet meals were served during the opening dinner table scene, of which the actors could dine on as they pleased since fresh plates were served for each take.
This episode takes place from January 15 to January 19, 1920.