Gregory Konow

Reese's counterpart, lethal and sexy government operative Samantha Shaw (guest star SARAH SHAHI), who tracks and stops terroristthreats before they occur, finds herself on the run – and the new focus of Reese and Finch's attention. However, their pursuitproves to be their most formidable ever when they discover that her remarkably elusive skills equal their own. Creator/executiveproducer JONATHAN NOLAN directs.

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.

Reese and Finch try to protect a psychologist whose unorthodox methods for helping his patients find closure could cost him dearly. Meanwhile, flashbacks reveal Finch's fragile state in the days following the bombing that killed his best friend, Nathan Ingram.

Jamie is under investigation after his police vest is found on a perpetrator; Frank debates whether to help an old friend whose home was invaded; Danny and Baez investigate the suspicious circumstances surrounding the death of a hotel employee.