New York
13 episodes of The Sopranos carry this thread, 12h 9m in all — 12 of them are in The Essentials.
Arc membership is derived from each episode's own title and summary text. It shows where a thread is foregrounded, not every episode it touches.
In airing order

Carmine's passing opens new wounds, while cousin Tony wants to put his past behind him. Tony Soprano, meanwhile, discovers a traitor.

With Carmine's passing and Feech's arrival, turf wars are breaking out around New Jersey. Junior's mental health, meanwhile, starts to decline.

Tony makes a request to Johnny Sack on behalf of his cousin, and Adriana makes a request to the FBI, followed by one to Chris.

Johnny Sack is granted permission to get out of prison for his daughter's wedding; Tony's on the look out for personal protection and Vito's secret double life is exposed.

Tony hires help from overseas to fulfill a favor he was asked for by Johnny Sack and decides whether one of his top earners deserves another chance as he acknowledges to Dr. Melfi he was another chance when survived his gun shot wound.

Christopher and Carmine travel to Hollywood to take the next step in making their movie but quickly realize they're out of their depth. Artie's restaurant falls prey to one of Tony's scams that was ran by Benny.

Phil takes out his revenge on Vito, while Tony grows frustrated with Anthony's lack of ambition or work ethic.

Tony and Phil begin an explosive conflict that puts Phil in the hospital, while Chris and Anthony both embark on new romances.

Paulie shows up at Tony's house to tell him he's learned the Feds are looking into a murder case from the early 1980s. In fact it was Tony's first killing where he made his 'bones'. Tony decides he and Paulie need to lay low for a while and they head off on a road trip to Florida. They reminisce about the old days but Paulie is definitely getting on Tony's nerves. They also find that many things along the route have changed over the years. Tony is particularly interested in knowing who may have told Johnny Sack about the fat joke directed at his wife. Uncle Junior meanwhile has taken to organizing a poker game with his new friend Carter Chong. Junior's as grumpy as ever but continues to suffer from memory loss from time to time. Carter likes Junior's rebellious attitude but things change when the doctors change Junior's meds and he becomes far more docile.

At the Borgata Casino, Tony decides to let it ride after winning at roulette. Tony loses everything he'd won, and then some, on 23. Meanwhile, Vito Jr. is going through a rebellious phase. Tony asks Phil to talk to Vito Jr. Phil grudgingly agrees. AJ proposes to Blanca over a nice dinner, promising her that he will rise from pizzeria night manager to restaurant chain owner in no time, and coaxes a "yes" out of her. At the Puerto Rican day parade, Blanca meets up with AJ and returns his engagement ring, telling him she just doesn't feel it.

Tony fails to reason with Phil as more problems increase with Anthony when his depression worsens and he attempts suicide.

The Beginning of the End. Phil finally puts the hits on the Soprano clan and Tony puts a hit on Phil which results in mistaken identity making everyone think its safe when its not and it results in a Death and Coma. After this happens Tony separates from his family to go into hiding as he sends Carmela, Janice, and the kids into hiding.

Tony and his family have to stay in hiding until Phil Leotardo is dealt with. His family don't like the lifestyle they have been forced to adopt. AJ and Meadow move onto the next step in their lives. Tony confronts Junior one last time.