When Bull joins the district attorney in a case against Kara Clayton, who claims she killed her billionaire husband in self-defense, tensions run high when he learns that his on-again, off-again romantic interest, Diana Lindsay, is defending the widow. Also, Chunk makes a decision about his future.

Bull's team takes on a seemingly unwinnable case; a mute man faces the death penalty if he's found guilty of murder and arson; Bull is stunned to learn that his ex-wife is remarrying.

Bull’s team is rocked when their client, Elliott Miles, is found guilty of murder, and they must regroup as the trial enters the penalty phase in order to prevent him from being sentenced to death. But when new evidence emerges that could prove Elliott’s innocence, Bull must find a way to present it in court without being found in contempt. Also, Marissa faces hard truths about her relationship with Bull.

Bull returns to work following his heart attack with a new rich client for the firm to represent: an insurance company being sued by a dying mother for denying coverage of her liver transplant.

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.

As Bull prepares for fatherhood, his work at TAC suffers without his top attorney, Benny, who quit in reaction to Bull’s romantic reconnection to his ex-wife and Benny’s sister, Isabella. In addition, the team faces a difficult time in court as they mount a defense for a young bartender on trial for involuntary manslaughter.

Bull and the TAC team struggle to adjust to a virtual court system as they weather the New York City shutdown due to the coronavirus.

TAC braces for an un-jolly Christmas when Bull and Benny represent Marissa and her estranged husband, Greg, in federal court after they're charged with money laundering and fraud connected to Greg's restaurant. As Bull and Benny defend the divorcing couple together so the prosecution can't use them against each other, they search for jurors who will believe Marissa had no knowledge of Greg's business dealings. Also, as Bull and Izzy prepare to baptize Astrid before the Christmas holiday, they reach an impasse regarding what they want from their renewed relationship.