Logan Crawford

Reese and Finch scramble to protect a software CEO (guest star Aasif Mandvi) when his behavior becomes increasingly erratic, following a hacker attack that reveals all his secrets and unravels his life.

Bull returns to work 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.

In the Season Four finale, Finch and Root race to save The Machine, which has been located by its AI rival, Samaritan. Also, Reese is caught in the middle of the final showdown between rival crime bosses Elias and Dominic.

Business becomes personal for Bull when TAC assists with a civil suit against the bank that funded the terrorists responsible for Cable's death; Marissa enlists her former homeland security co-worker Taylor Rentzel to help with the suit.

Danny must track down the drug cartel that attacked a convoy transporting drugs to be incinerated, leaving Baez seriously injured; Frank must tread carefully when a lieutenant's actions cause controversy for the police department.

Danny and Baez search for a veteran who may have PTSD; a woman seeking justice for her murdered daughter catches Frank off-guard during a press conference.