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.
In the episode, Nucky meets with Rothstein for a potential business, while Van Alden gets involved with the Capones.
According to Nielsen Media Research, the episode was seen by an estimated 1.99 million household viewers and gained a 0.8 ratings share among adults aged 18–49.
The episode received extremely positive reviews from critics, who praised the performances, directing and character development.
After spending the day with him, the Capones offer a share of O'Banion's territory to Van Alden if he collaborates with them.
In August 2013, HBO confirmed that the fourth episode of the season would be titled "All In", and that it would be written by David Matthews, and directed by Ed Bianchi.
"[5] Alan Sepinwall of HitFix wrote, "Ethnic pride runs especially deep in 'All In,' an episode in which black, Jewish and German members of our large ensemble express love of their heritage in different ways.
While a bulk of the show was still chess-piece writing, it felt more charged and alive than usual, especially the unexpected and magnetic face off between Atlantic City’s Nucky Thompson and the Big Apple's Arnold Rothstein.
"[9] Michael Noble of Den of Geek wrote, "Here, Rothstein exemplifies the entire spirit of the show, as did the episode itself.
All In, an expression from poker, is concerned with the nexus of work and pleasure and with showing us just how quickly the good times can go sour.