Frankie has to force Brick into asking Cindy to the high school prom but worries that his quirkiness could spoil the happy event; Lexie talks a clueless Axl into giving Sue a belated 21st birthday present; and Mike becomes frustrated over how to get used to a new TV remote.
On Murtaugh's first day on the job as interim captain, the wife of a popular businessman is abducted and the squad finds a connection in the case to Rigg's father. Riggs is left to grapple with his family and work.
The gang gathers for a one-year memorial service for a beloved friend. Meanwhile, Jess discovers Coach owes Nick a large sum of money.
Ronnie applies for a job on another airline, not thinking about what a change in route might mean for her relationship with Bryan. Meanwhile, Captain Dave plans to propose to Patricia, against Nichole's wishes, and Artem encourages Colin to stand up to his ex-wife.
With the Owl's identity revealed, Alec, Isabelle, and Clary head to Alicante to try and find a way to stop him. Luke and Simon team up to track Lilith's latest possible victim. Maia reflects on her past.
Strong emotions persist as Dorit and Teddi struggle to sort out a year of misunderstandings. Kyle reveals the devastating details of her house burglary last Christmas. Then, Camille Grammer joins the ladies and brings an unexpected gift for Andy. And Lisa Vanderpump finds herself in the hot seat when she defends her reaction to Dorit's betrayal.
Dallas teen track star Shania Gray is left traumatized after being raped while babysitting when a new social media friend offers support, she opens up to him, leading Shania into a trap that ends in tragedy.
Sara Carter begs Gibbs to investigate her mother's murder; she believes the wrong man was convicted; Abby is awarded a dinner reservation for two to a new five-star restaurant in an igloo and has to decide which co-worker deserves to go with her.
Unbeknownst to Shay, Tray was invited to her mother's funeral reception, much to her disapproval. Tray stands up for Shay when her family gives her a hard time about not being there in her mother's later years.
Sig takes heads off the grid on a daring midnight mission to shake his rivals. The Cornelia Marie pays the price for a rotten alliance, and an injured deckhand could force the boat in early. Keith gets big news from his doctor on a mystery illness.
Four blade smiths find the devil is in the details when they must combine two or more steels to forge J. Nielson's favorite blade, a Damascus European dagger. In a challenge where symmetry and precision can make or break a blade, two smiths produce knives that survive J.'s merciless tests. In the final round, they have five days to forge a fearsome pole weapon–the Zande Spear.
Octavia is forced to take guidance from an unlikely ally when the future of the bunker and all those inside it is jeopardized.
Bear Grylls arrives on the island eager to get the stories behind the castaways' class war and their often dubious survival strategies.
Bull's team takes on a seemingly unwinnable case; a mute man faces the death penalty if he's found guilty of murder and arson; Bull is stunned to learn that his ex-wife is remarrying.
Barry and Team Flash team up with Gypsy to try to thwart Thinker's plan. Meanwhile, Cisco and Gypsy have a heart to heart talk about their relationship.
After a shooting occurs during a block party, the staff is overrun with victims; Dr. Choi devises a new mass casualty plan; Dr. Manning struggles to stay focused when she realizes her son and nanny might have been at the scene.
Gwen defends a Frotteurist, meanwhile Charlie battles an unwinnable stash and cash drug case.