It is the 19th overall episode of the series and was written by co-executive producer Howard Korder, co-producer Steve Kornacki and Bathsheba Doran, and directed by Allen Coulter.
The series follows Enoch "Nucky" Thompson, a political figure who rises to prominence and interacts with mobsters, politicians, government agents, and the common folk who look up to him.
According to Nielsen Media Research, the episode was seen by an estimated 2.74 million household viewers and gained a 1.1 ratings share among adults aged 18–49.
Nucky visits professional boxer and world heavyweight champion Jack Dempsey after training, asking him to promote the newly founded Radio Corporation of America before his incoming fight.
Van Alden faces trouble in his personal and professional life; Lucy demands money for raising his baby, while his office is taken over by Assistant Attorney General Esther Randolph.
Jimmy explains his next strategy to Eli, Harrow, Mickey, Luciano, Lansky and Capone; he intends to replace Nucky with Edward L. Bader when the former goes to jail.
The episode was written by co-executive producer Howard Korder, co-producer Steve Kornacki and Bathsheba Doran, and directed by Allen Coulter.
Phil Pirrello of IGN gave the episode a "great" 8.5 out of 10 and wrote, "'Peg of Old' spotlights the different approaches Nucky and Jimmy take to get their houses in order, and the consequences of doing it.
Club gave the episode an "A–" grade and wrote, "'Peg Of Old' was taut, emotionally rich, lavishly produced, and it moved the plot forward in a major way.
"[6] Vulture wrote, "Here's hoping the show picks up again next week with more inspiration, instead of dutifully diversifying its attentions among an ever-thickening portfolio of narrative accounts.
"[7] Michael Noble of Den of Geek wrote, "Blood relations can be as dramatic or as mundane as any human connection, but they are invariably tinged with additional drama.