Bull agrees to help the parents of a former employee sue a drug company when their son commits suicide during a drug trial. However, the task is complicated when the company brings in their own trial scientist.

The DA hires Bull to help convict Hazel Diaz, an infamous drug dealer who murdered a police officer but has managed to avoid jail for years on an insanity defense by feigning schizophrenia.

The TAC team works tandem cases when Chunk represents his first legal client, Darius Lambert, a young man facing federal counterfeiting charges, and Bull represents Darius’ grandfather, Willie Lambert, who may lose his business to the FBI for owning the barbershop where the fake goods were sold.

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.

Chunk's friend asks Bull to help the parents of an athletic scholarship student bring a wrongful death suit against the school after the teen dies suddenly while training.