In the aftermath of the assaults, the team must now try to understand why they were targeted and if there is a bigger plan in place.

The team comes together to celebrate John and Bailey's wedding; meanwhile, Celina discovers a discrepancy in her case, leading to a new discovery. Elsewhere, Lucy and Tim's relationship is put to the test.

Nolan and Bailey's honeymoon is more of a nightmare than a dream when it turns into an active crime scene; Tim and Celina partner up and must uncover the identity of a John Doe.

It's Thorsen's first day back since the assault, and he's tasked with a series of high-stress cases to determine whether he's ready to work. Elsewhere, the team investigates a homicide case with a potential tie to the pentagram killer.

When a toddler is found at the scene of a crime, John and Bailey must decide what to do with it. Meanwhile, when someone from his past returns, Tim disappears and leaves Lucy in the dark.

After fostering, Bailey pushes for a baby while John and Celina hunt a vengeful escapee.

After a mafia-related mass casualty, the team is tasked to keep the peace at the hospital; Lucy and Celina work together to investigate the suspects behind the attack; Tim and Aaron embark on a metro ops mission.

Officer Nolan and Celina take on a special case. Monica enlists help to identify her attackers. Lopez and Harper discover a connection to the trail of crimes.

Sgt. Grey helps the team prepare for their biggest mission yet. Aaron, Lopez, Celina, Tim and Smitty discover a surprising connection in their case.