After multiple people are targeted and killed with a poisonous gas in broad daylight, the team races to find the killer, who they believe is tied to an eco-terrorist plot. Meanwhile, Maggie continues to explore motherhood.

It's Officer Aaron 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.

Charlie fears the worst after Rex goes missing while investigating the theft of a champion horse.

As Luca's CPS interview nears, Thony focuses on getting Fiona back home with the help of Jorge. Meanwhile, Nadia continues to investigate Arman's disappearance and finds herself face-to-face with Ramona.

Will and Faith investigate a small town haunted by the "Boo Hag", where a suspect is quickly assumed, but connections to the past unveil unexpected surprises. Meanwhile, Ormewood investigates a TV star's murder, and Amanda senses impending danger.

Roz finds herself in court after her wedding venue falls through, prompting Abby to offer up the courthouse for the big day. Dan strikes up a connection with a wedding guest who has ties to his past, only to realize that his reputation precedes him.

The Battle Rounds end as Chance the Rapper, Dan + Shay, John Legend and Reba McEntire prepare their artists in hopes of advancing to the Knockouts. Each coach has one steal and one Playoff Pass, which sends an artist straight to the Playoffs.

Andrew's vasectomy plan strains his friendship with Hudson, while Camille and Khia clash over buying a car.

When Mark finally gets the chance to take the stage as a stand-up comedian, he realizes he doesn't have his own distinct voice. And so, Mark draws inspiration from those who matter the most to him.

Hoping to confirm their compatibility, Julia and Trey ask Jim to give them pre-marital counseling, believing him to be the most knowledgeable guy for the job.

The team has finally reached target depth in the Garden Shaft, but their drilling efforts may be thwarted by a legendary flood tunnel.

The Fly Team is called in to investigate when an American college student is arrested at a hostel in Prague for showing aggression toward local police who were dismissive of her sexual abuse claims. Also, Vo makes use of her sexual assault advocacy experience from her army days as they work to ensure the victim gets justice.

The MPU searches for a homeless female teen that disappeared after running away from home and living in Philly's Gayborhood. Kemi is hit especially hard as the team races to find and rescue the missing teen. Jason and Nikki spar over his continued investigation into the car bombing.

Shaun and Lea struggle to balance their parental duties with their personal lives. Meanwhile, Park and Morgan try to find the time and space to reignite their romance amidst the demands of parenthood and work, and Lim's mother makes a surprise visit.

After the Fugitive Task Force mobilizes to help apprehend an active shooter on a college campus in Queens, they find themselves in the middle of the glitzy world of college basketball. Also, Barnes and Charlotte attempt to work on their relationship.

Jordan Klepper and Josh Johnson debate Florida's age limits for social media, the GOP grapples with "What Women Voters Want", and author Jim Sciutto discusses "The Return of Great Powers".

Jimmy takes a moment to look at campaign ads from other politicians before speaking with guests Maya Rudolph and Pete Townshend and welcoming a performance from The Who's TOMMY.

Stephen welcomes actress Carol Burnett and a musical performance by Waxahatchee & MJ Lenderman.

Lady Ochiba returns to Osaka in order to accelerate the Regents' campaign against Toranaga. In Ajiro, Toranaga tests Mariko's loyalty to his cause.

With the world in a state of panic following a momentous declaration, Wade gathers the world's greatest minds to prepare a defense plan.

Tensions rise between the girls as Davey tries to hide a threatening secret from the past.

Helena, John and Henry risk everything to rescue Meiyin from Nerva.

When Professor T is jailed and finds the sights, sounds and smells of prison hard to take, Dan and Lisa try to distract him with a murder case.

A bombshell reunion separates Jamie from his friends and puts him in grave danger, while the rest of the gang get to grips with the eccentric festival. Soon, everyone finds themselves drawn into an unwanted encounter with an old foe.