When an important engineer at a company that manufactures collision avoidance software in cars is taken hostage, Eric and the team email the kidnapper, Joe, but discover a third party…

Bill and Wendy interview candidates for a fourth member of the team. Holden is intrigued by complaints about a school principal’s odd habit.

Danny and Jackie investigate the suspicious murder of a high rolling investor, who had injuries from a fight, but no marks on his hands. Meanwhile, Frank puts Jamie under house…

The Machine sends Reese and Finch to a wedding to protect a pair of POIs before their nuptials. Also, Fusco becomes angry at being kept in the dark by the…

Olivia’s sister, Rachel, visits; Walter, Peter and Olivia try to solve the murder of an esteemed epidemiologist, which may be linked to Olivia’s abduction.

Serena returns from her trip to Spain with Poppy and Gabriel. Blair makes a secret deal with Nate’s grandfather. Dan takes a job to earn money for college.