Season three of Bull finds Dr. Jason Bull returning to work at TAC after recovering from his heart attack. His first case back is a tough one, as he asks his team to help defend an insurance company who is being sued by a young mother who was denied coverage for a liver transplant.

Season four returns a few months after the bombshell revelation that Dr. Jason Bull is expecting a child with his ex-wife and Benny's sister, Isabella Coln̤. While Bull prepares for impending fatherhood at home, his work at TAC suffers in the wake of Benny's resignation as TAC's staff attorney after learning Bull slept with Isabel at their father's funeral.

When the final season begins, Bull and the TAC team must call upon all their collective experience to locate Bull's daughter when the child is kidnapped, and her abductor warns them not to go to the police. As the team works to find the little girl before the kidnapper's clock runs out, Bull begins to suspect the abductor is someone connected to his previous career in private psychology. This then leads to the Trial Analysis Corporation team heading...