Michael Quinlan

When a Reagan family friend, an undercover detective, is killed, Linda and the boys worry about Danny, as his relentless search for the killer takes a toll on his emotional state.

Danny causes waves in the department when he investigates a closed case, the suicide of a firefighter, at the insistence of the man's 12-year-old son.

Amidst a shifting political climate, Frank goes head to head with City Council Speaker Regina Thomas (Whoopi Goldberg) over protests against police brutality. Also, Jamie and his nephew Joe Hill (Will Hochman) work together to locate Danny and Baez when they go missing while searching for a killer, and Eddie steps up to help an abrasive woman find her father's body after it was misplaced during the outset of the pandemic.

While investigating an ear surgeon's murder, Goren and Eames discover that he had testified in a controversial case involving another doctor.

When a murder suspect becomes an underground hero, Brady seeks help from a former colleague to track down a culprit.

Pennsatucky, Piper, Crazy Eyes and Lorna get closer with their new admirers; tensions -- between Sophia and Gloria, and Alex and Lolly -- escalate.