A familiar foe comes to Jim's aid in the Darklands. Back in Arcadia, Toby's distracting new headgear picks up an important clue.
Beau leaves the boys hanging about the Peterson ranch. Rooster takes Jen on a date. Colt and Abby fight about their future.
Colt wants to buy Sam Peterson's ranch -- with or without his family's blessing. Colt and Heather have a heart-to-heart about their loss.
Beau ponders a lucrative business offer. Rooster runs afoul of the liquor board. Colt tries to make peace with Abby's dad.
Abby moves in with Colt and Beau when she learns shes losing her job. Rooster and Jen the engineer bond over getting dumped.
A job opportunity in Denver threatens to drive a wedge between Colt and Abby. Maggie pushes back about the pipeline.
The investigation takes a bizarre and troubling turn when Winnie is sent a box containing a live rat with a set of co-ordinates leading to the latest victim of the Pied Piper.
Nick Cannon, Pete Davidson and PnB Rock battle it out in "Pick Up and Kill It," "Hood Jeopardy," "Pie or Die" and the "Wildstyle" battle.
When Hondo’s imprisoned childhood friend asks him to protect his son from gang violence, the favor brings SWAT into contact with a new local crime outfit. Also, when Luca’s grandfather, a SWAT legend, passes away, he struggles with his grief and a painful family secret.
Sheldon and Wolowitz plan birthday celebrations for Amy and Halley, respectively. Also, Leonard get a Christmas letter from his brother that causes him to spiral out about his own lack of accomplishments.
A woman is beaten and stabbed to death in her home in an act of vengeance; a Kansas City man is unable to get out of a dangerous business.
In the final episode, Karl and Elise face a tense and gripping showdown with the Pied Piper, while the truth about the Moreau abduction is revealed at last.
Karl makes a foreboding discovery at Elise's apartment, and the pattern of missing people continues.
As a young mother-to-be helps Karl and Elise with their enquiries a new development threatens to tear the pair's partnership apart.
A shocking discovery is made at an immigration removal centre alongside a sinister animation containing a hidden message.
When Jen and Greg hire Clementine as a part-time nanny for Lark and invite her to join them for dinner, the waitress mistakes Jen for Lark's grandmother. Also, Tyler's new girlfriend turns out to be Sophia's fourth grade teacher, John hires a questionable company to set up an escape room in his house, and Matt grows frustrated with Colleen when she blames a valet for stealing her lottery ticket.