According to Timothy Van Patten, Martin Scorsese's involvement as an Executive Producer consisted of reading the scripts, watching the rough cuts, and making suggestions. Van Patten praised the notes Scorsese gave, because they are very precise and insightful.
Arnold, a Nucky Thompson on the telephone.
Arnold Rothstein: I'll take it in here, darling.
Carolyn Rothstein: How's that stomach?
Arnold Rothstein: It's still a little tentative.
Carolyn Rothstein: So much apple bread.
Arnold Rothstein: It has a binding effect.
Carolyn Rothstein: Is that the best thing right now?
Arnold Rothstein: A sound elimination is the basis of good health.
Al Capone's son, Sonny, is portrayed as being entirely deaf at the age of two. In real life Sonny contracted an infection that left him only partially deaf and only at age seven. However, this series is intended to be fictional, not based on real life events. Factual inaccuracies are therefore not considered goofs.