When the team consults for the NYPD on the defense of a police officer accused of excessive force in the shooting of an unarmed man, the social politics surrounding the case create tension within their own ranks.

Bull’s new relationship with Diana, his on-again romantic rival, is complicated by his renewed feelings for his ex-wife, Isabella, when they’re reunited by the sudden death of her and Benny’s father. Also, a deceased tech billionaire’s brother comes to TAC for help in bringing suit against the doctor he holds personally responsible for the tycoon’s death.

Bull's romantic rival, Diana Lindsay, jeopardizes her career when she secretly has Bull come to Texas to assist a couple fighting against her former client for custody of their grandchildren.

Bull works to convince a jury that an alleged murder was actually a tragic accident when TAC represents a woman charged with her 3-year-old stepdaughter’s death.

Benny’s previous career with the District Attorney’s office comes into focus when Chunk, working with his law professor’s legal clinic, aims to get a new trial for Eddie Mitchell, a man he believes was wrongfully convicted of triple homicide by a prosecution team that included Benny.

Bull and the TAC team take a difficult pro bono murder case before the holidays and realize it will take a Christmas miracle to win, as the presiding judge has a grudge against Bull. Also, Marissa pushes for an office Christmas party, and Taylor embarks on a new romance.

Bull assists in the murder trial defense of an old friend, Vivian Cahill, an in-debt professional gambler accused of killing her wealthy father to gain her inheritance. Knowing their client had a complicated relationship with her father, Bull and Benny enter into voir dire looking for jurors who sympathize with dysfunctional family relationships.

Bull and the team help Taylor bring a civil suit against the woman who killed Taylor's friend in a hit-and-run when the driver evades criminal charges by claiming diplomatic immunity.

Bull assists Chunk as he represents a convict from his law school’s legal aid clinic, a woman accused of killing a guard while trying to escape during a prison transport. While the prosecution alleges the woman shot the guard as she tried to flee, Chunk argues that she is being falsely accused by a guard who attempted to sexually assault her during the transport.

Bull and the TAC team must call upon all their collective experience to locate Bull’s kidnapped daughter, and the abductor warns them not to go to the police. As Bull works to build the most important psych profile of his life, he begins to suspect the captor is someone connected to his past.

Bull and Izzy experience marital discord when Bull has TAC lead the defense for Diana Lindsay, his ex-girlfriend who’s accused of killing her lover’s wife. Also, personal conflicts abound for the TAC team when Chunk finds himself defending Diana in court against his boyfriend and prosecutor, Robert.

Bull and the team head to court one last time to finalize a negligent homicide defense that will change the nature of their company and their lives forever.