An anonymous tip leads the team to investigate an urgent death row case, ultimately sending Zapata undercover. After nearly getting caught during the mole hunt, Jane considers leaving the FBI.

When Weller and Jane go missing during an undercover operation, the rest of the team must interrogate two criminals who hold the key to finding them. AUSA Weitz returns with a vendetta against the team.

Jane and her new flame Oliver find themselves in a dangerous situation that exposes the secrets they've both been keeping. Uncertain if they can trust each other, the couple must stay alive while Weller and the team race to save them.

Facing a threat within the FBI, the team is forced to run a covert operation out of Jane and Weller's apartment. A tattoo leads to a doctor with a deadly secret.

A CIA source threatens to tear the team apart. Rich's place in the FBI is called into question. Roman and Crawford spend a day together under strange circumstances.

Jane is forced to recruit someone from her past to help take down a dangerous alliance.