Yet another academic misstep by A.J. forces his parents to contemplate military school. Tony orders Ralph to deal personally with the Jackie Jr. situation, and later seems to take Ralph's side in a money dispute with Paulie. Once again, the family gathers in Artie Bucco's restaurant, where Meadow reflects on being a Soprano.

With Paulie in jail, Christopher becomes acting capo, but he gets off to a bad start with Patsy. Still troubled by Jackie Jr.'s death, Meadow contemplates taking a year off from college to travel. Meanwhile, Adriana is in a bind after ending her friendship with Daniele, and Silvio discusses a misunderstanding at a Newark riverfront construction site.

Checking out Ralph's promising new filly at the track, Tony displays a flair for horse-racing strategy--and discovers an unexpected affinity for the stable life. Adriana finds her rock club being used as a place of business for Chris and his pals. Meanwhile, a court artist incurs the wrath of Uncle Junior, and Janice feeds Bobby in his hour of need.

Tony and the gang throw Paulie a Bada Bing bash after his release from jail, but it doesn't take long for old tensions to resurface. Carmela's cousin Brian throws out a hypothetical investment scenario that Tony and Ralph attempt to turn into reality with the help of Assemblyman Zellman and a black community leader.

After an aggressive team of reporters lowers the boom on Uncle Junior, his lawyers try a new strategy. Ralph has some fun at the expense of Paulie and his mother, but soon winds up with his own family problems. Meanwhile, Tony again finds refuge at the stables.

In the Season Four finale, Tony and Carmela contemplate purchasing a shore house, but a voice from the past threatens the deal. While Uncle Junior breaks out the Hearty Burgundy, Little Paulie and Benny break in a new sound system on the Stugots. With Carmine apparently intent on putting the past behind him, Tony and Johnny Sack weigh their options, carefully.

Tony sizes up a contractor's gift, then reunites with his paroled cousin, Tony Blundetto. Paulie and Christopher relive some not-so-special memories. Carmela launches a film club. Adriana grapples with her guilt. A familiar figure 'crosses over.'

With the feds pulling a new trump card, Adriana ponders her options. Tony B. unloads some heavy baggage on Tony, and vice-versa. Johnny Sack makes Tony an offer he can refuse, and Tony offers Carmela a deal to make her real-estate dreams come true.

Gene Pontecorvo makes a final break from the mob life, while Junior's paranoid delusions could be the end of Tony.

The family tries to cope with Tony's hospitalization and possibly impending death, while Tony begins to hallucinate a new life parallel to his own.

Phil Leotardo seeks to continue a cycle of retaliation between the New York and Jersey families. Christopher wrestles with his addictions. Tony decides keeping Carmela occupied with the spec house is for the best. A.J. gets a new girlfriend.

Christopher's Cleaver premieres, showing Tony how he feels about him. Johnny Sack faces a health crisis. Phil Leotardo resents his family, and himself, for being weak and downtrodden. Silvio gets caught up in New York's power vacuum.

The relationship between Christopher and Paulie's falters, while A.J. grows depressed over his break-up with Blanca.

Tony attempts to repair the rift between New Jersey and New York. A.J.'s depression struggle continues. A New York associate crosses the line with Meadow.

The spectre of disloyalty among the crew hangs over Tony as Phil Leotardo decides how to handle recent issues with the Soprano crime family. A hit gone wrong comes at a huge cost. A.J.'s conquering of his depression is challenged.

Tony seeks to find a peace with the Leotardo crew while dealing with rumors a member of his own crew may have flipped. A.J. makes a decision regarding his future and Junior's slide into dementia continues.