Atwater's attention is diverted by an old case when a CI from his past returns with a tip on a series of brutal armed robberies.

Intelligence chases down a lead in the ongoing serial killer investigation as news of the case reaches the public.

As the months-long serial killer investigation reaches its close, Voight must outsmart the offender in a race against the clock; Upton makes a vital decision.

Intelligence is swamped with cases as they catch a high-stakes drug bust just one month after Voight's near-death experience.

The team copes with disaster as they participate in a manhunt across the city.

Atwater attempts to maintain balance as he works with a forensic psychologist on an armed robbery case.

ASA Chapman helps Intelligence with an investigation that brings up unpleasant memories for Voight.

Intelligence supports Officer Cook in a disagreement against her partner over an investigation.

Hosts and expert analysts preview the upcoming Premier League action; coverage includes a roundtable discussion of key matchups and predictions.

Coverage of top-tier soccer from England.

Discussion and expert analysis of the goals scored throughout the Premier League weekend are featured, including highlights of the action.

A criminal's unique occupational habit gives investigators the important clue they need to apprehend him in relation to the death of a college student.

First responders deal with holiday emergencies such as a toy store stampede and a chaotic mistletoe stunt; Bobby rethinks his and Athena's future.

Bobby is first introduced to Athena's patients; Doug works his way deeper into Chimney's life after Maddie tries to put an end to her marriage.

Chimney's history at Station 118 is explored as he works hard to become the paramedic and firefighter he is known to be.

It's all hands to the deck when Maddie goes missing and the first responders rally together to carry out an intense search.

A massive power outage knocks down Los Angeles' 9-1-1 system; the first responders face multiple explosions and a complicated child birth.

An emergency arises during a bank manager's special going-away party; the first responders encounter a mystery when they are blamed for a risky heist.