Scott's loyalty to Med and the police department is challenged. The annual random drug testing puts a doctor's career in jeopardy. Choi tries a risky old-school method on a patient. Halstead helps Hammer search for her mother.

After Sara, Ava, Behrad and Gary arrive in New York City, they track down Dr. Gwyn Davies, who isn't the scientist they expected. Astra, Spooner, and Gideon are still trying to stop the Legends from using the time machine, but they run into some more setbacks along the way. Meanwhile, in the pocket dimension Nate and Zari work together on the Hoover situation as well how to make their future together work.

The final 4 Group A singers compete in the semifinals and 2 are eliminated. Guest judge will.i.am joins the panelists' desk.

Marcie helps survivors and families of the victims of a church shooting. Reggie feels a professor is promoting misogyny.

Ryan asks Sophie to accompany her to a dinner at Jada's to do recon on what her estranged mother knows about Wayne Enterprises, but the evening takes a turn when an uninvited guest drops in on the intimate gathering. As the terrifying evening unfolds, Ryan witnesses another side to Marquis and her mother.

The castaways must work to make amends after betrayals. An interesting turn of events takes place at the reward challenge.

Severide and Herrmann clash over office space. Boden looks at Pelham's past as he considers making him permanent. Gallo's resentment of Pelham comes to a head. Brett and Ritter force Violet to confront her true feelings for Gallo.

Tickle and the Laws escape from a raid on their still site only to discover that Josh is missing; Tim and Howard tackle a gas shortage with a high-proof solution; Mike and Jerry rebuild their oak barrel pot still after blowing up their first attempt.

As the team investigates the stabbing of a father with two young daughters, they begin to suspect there is more to the story than meets the eye. The FBI investigation into Roy Walton's death intensifies while Voight, Upton and Halstead feel the heat.

Ambrose discovers the source of Percy's ritualistic practices and dives deeper into her past.

Marie and Chuck set new boundaries for their relationship, and Marie makes progress on her movie with Quintrell; Hattie struggles to find a happy medium with her writers' group.

Max puts CSI on lockdown when evidence in a new murder tips Grissom and Sara to a new suspect in the crime lab. Also, Folsom and Allie investigate a series of chilling killings at a dilapidated clown-themed hotel.

Coming Soon...

Rep. Paul Gosar posts a violent anime video targeting Rep. Alexandria Ocasio-Cortez, The Daily Show salutes wannabe veterans, and artist Bad Bunny discusses his role in "Narcos: Mexico".

Jimmy welcomes actor Will Ferrell, actress Lucy Hale, and comic Dusty Slay.

Stephen welcomes actress Aubrey Plaza and musician Bruce Springsteen.

While Jessi sorts through her feelings for Ali, Nick joins Devon for a boys' night, Andrew shows off his new persona, and Missy starts a rumor online.

Victor is shaken by a murder and takes action. Violence escalates in Tijuana. New boss Enedina develops a plan to challenge her cartel's rivals.

After three months in an ICE detention center, Casimiro emerges to discover he's a local celebrity. But life at Mama Fina's is not as he left it.

The Warners give safety advice.

Lahela accepts a medic job on Walter's pro surf tour in Australia but Benny and Clara refuse to let their 16-year-old live with her boyfriend and leave her medical residency for the summer. As the Chief of Staff announcement nears, Lahela circumvents Clara's authority, requesting a sabbatical, and Benny insists Uncle John should be discharged early for the family's King Kamehameha Day potluck. Walter offers to skip his tour and Lahela musters the strength to do what's right, even if it's hard.

Richard Sackler and Purdue work the system to prevent their drug from being reigned in, Bridget has a breakthrough in her mission, Betsy has hit rock-bottom while Finnix explores new avenues, and Rick and Randy ready their criminal case.

When Elliot's public reading of Sarah's poem tanks, Alicia rethinks her tendency to meddle in the affairs of others. Miles, Robyn, and Luke attempt to go phoneless.

Inspired by Jack, Cooper hands out paper hearts to brighten everyone's day-and learns his kindness is the true gift.

James welcomes actor Dwayne Johnson and a musical performance by Avril Lavigne.

Tigress catches up with her sister Cheshire as a shadowed history catches up with them both.

In 2068, the war between the Union and the Polity begins with a shocking strike on a major stronghold. As Yaz joins the resistance movement, Chase confronts a shocking truth.

Desiree Burch draws on her face, Guz Khan endures a ball to the groin and Alan Davies loses an eye, as the quest to win Greg Davies' golden head heats up among our comic contenders

Dara O'Briain and Hugh Dennis look back on recent events with guests Angela Barnes, Ed Byrne, Sarah Kegworth, Glenn Moore and Ahir Shah.