Jason Alan Carvell

In the fourth season premiere, the team must devise new ways to continue their work without being detected by Samaritan after they’re forced to take on new identities created by Root. Some, however, find it hard to ignore the Machine’s numbers, putting them all at risk of being seen by the rival Machine.

Holmes and Watson's investigation into the murder of a religion professor puts them on the hunt for a killer connected to the occult. Also, Holmes and Watson curate a list of potential replacements for Detective Bell when it looks likely the officer will be asked to join the U.S. Marshal Service.

While investigating the murder of a gang leader, Danny and Baez learn the accused shooter is an ex-con who is romantically linked to his parole officer, who might be assisting in a cover up. Also, concerned the murder might spark further violence, Frank steps in to mediate but must deal with Mario Hunt (Method Man), the rival gang leader who killed a police chief two years ago.

On the eve of Pride's wedding to Rita, and Connor entering witness protection, Pride must find who attacked Jimmy (Jason Alan Carvell) and Connor (Drew Scheid), while also figuring out Sasha's (Callie Thorne) ulterior motives regarding their son.

The NCIS team places Mateo Diaz (Octavio Rodriguez), a high school gang member turned informant, in protective custody while they investigate the murder of his junior reserve officers' training corps instructor. Also, Pride needs his brother Jimmy Boyd's (Jason Alan Carvell) help to gain Mateo's trust.