When Margaret is talking to Nucky about the loss of his father, she sits and takes his hand in hers. In the next shot, he is holding her hand.
Lucky Luciano is seen smoking in the stables. With so many prized horses and so much dry straw around, smoking in the stables has been banned for centuries.
Nelson van Alden's nanny Sigrid is singing the Swedish song "Trollmors vaggvisa" to Abigail, but that song first appeared in Margit Holmberg's songbook "Nu ska vi sjunga", published in 1943.