The team chases an unlikely serial killer whose end game takes a shocking turn. Also, Hana returns from medical leave, and Jess and Sarah's relationship continues to evolve.

After a double murder takes place in a small town, the team goes after the vigilante who relies on internet sleuths to exact revenge on suspects in the name of justice. Also, Jess and Sarah's relationship continues to grow, but not everyone approves.

The team heads to D.C. to protect Ortiz's former informant after a hitman tries to kill her. Also, Sarah helps Jess' family prepares for Byron and Marie's last-minute wedding on Jess' farm.

Jess and the Most Wanted team head to Tennessee to track down an undercover DEA agent who appears to have turned dirty amid a major drug ring operation. Also, Sarah wonders if it was a mistake to move in with Jess and Tali so soon.