Dr. Jason Bull is the charming and cocky founder of successful trial consulting firm Trial Analysis Corporation, where he and his team of experts employ psychology, human intuition and high-tech data to understand jurors, lawyers, witnesses and defendants, and construct effective narratives to help their clients win.
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.
Business becomes personal for Bull when TAC assists with a civil suit against the bank that funded the terrorists responsible for Cable’s death. Also, Marissa enlists her former homeland security co-worker and international banking cyber-investigator, Taylor Rentzel, to help with the suit.
Bull and the TAC team are at the center of a federal civil suit dividing the city when they consult for the NYPD on the defense of a police officer accused of excessive force in the shooting of an unarmed man. As they aim to select jurors who will focus on the shooting’s circumstances, the social politics surrounding the case create tension within their own ranks.
Bull agrees to help Chunk’s daughter, Anna, when her journalism professor, Chloe, is sued by a dating app developer for trying to steal data for an exposé she’s writing about sexual assault cover-ups. But the stakes are raised when the company alleges that she actually stole proprietary information and intended to sell it to a competitor.
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.
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.
As Christmas approaches, Bull is amused when he meets a 9-year-old girl who wants to hire him to help her divorce her parents, but he’s shocked when a judge appoints him her temporary guardian. Also, Marissa discovers disturbing information about her boyfriend, Kyle.
Bull works with J.P. Nunnelly on the first of three cases to repay her for defending his brother, Benny, at trial. However, they clash over their client, a computer cloud company that is battling the F.B.I. to retain privacy over their client files that could help identify the source of a recent eco-terrorist attack.
Bull makes a deal with top criminal attorney J.P. Nunnelly to defend Benny when he goes to trial for misconduct in a case related to his former career with the District Attorney’s office.
Bull and the Trial Analysis, Corp. team travel to Miami with J.P. Nunnelly to work on a controversial drug trafficking case in which both the clients’ and the jurors’ lives are in danger.
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 confronts his guilt over closing his psychiatric practice to start TAC when his former patient, a young woman who is a clinical sociopath, goes on trial for killing her brother. When Bull and Benny’s client has no memory of the crime due to her mental condition, they enter a "Not Guilty by Reason of Insanity" plea and aim to seat jurors that are sympathetic to mental illness.
Bull helps Jim Grayson, a respectable family man who was arrested for changing his identity after being the unwitting getaway driver in a fatal robbery years ago. Bull hopes they can convince the jury that Jim has redeemed himself for his past misdeeds by living an upstanding life for years.
Bull aims to prove temporary insanity at a murder trial for his client, Troy Dickerson, a young man he believes was brainwashed by a cult-like spiritual learning center to kill his father. Also, Danny and Chunk go undercover at the learning center to find the perpetrator responsible for their client’s reprogramming.
Bull helps a doctor who crossed state lines to purchase a marijuana-derived oil to treat her patients in Virginia, where the oil is illegal. But the case is complicated when Assistant U.S. Attorney Sylvia Banner has the DEA arrest her for possession with intent to distribute.
The DA's office asks Bull to assist them in their prosecution of a fraternity when a pledge accidentally drowns during a hazing incident, but his efforts may be derailed when the students close ranks to stonewall him.
When Bull assists the U.S. Attorney’s Office with a manslaughter trial against a real estate magnate, Andrew Withrow, he finds himself once again opposing Diana Lindsay, his romantic rival. As the case gets underway, Bull’s penchant for winning goes into overdrive when he realizes the defendant is a clinical sociopath determined to use Diana to antagonize him during the proceedings.