A handsome businessman returns Max and Caroline’s missing cat, Nancy, who comes home with a big surprise.

Francine is up for an award for her lonely housewife novel, so the family heads to the Big Apple for the ceremony. Meanwhile, Stan and Hayley hang out with actor Robert Wuhl, and Steve and Roger recreate their Wheels and the Legman personas.

Norman's relationship with Emma weakens his bond with Norma. Romero asks Norman some hard questions.

Jimmy shows Chuck that he's willing to do almost anything to win a case, even if it means getting his hands dirty.

Detective Kevin Ryan is on the security detail of a charismatic congressman attending a charity event when shots suddenly ring out. Driven to apprehend the killer, Ryan must revisit the events that led up to the shooting, with the help of Castle and Beckett.

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When three FBI agents are killed in an explosion following a successful undercover sting operation, the team searches for the person behind the attack. Meanwhile, Deeks and Kensi realize the team knows about their relationship, as Hetty pairs Kensi with Sam and Deeks with Callen during the investigation.

While on a mission to save lost hikers, Team Scorpion’s helicopter crashes, igniting a massive wildfire that quickly closes in on them. Also, Sylvester must help their injured pilot who is unable to make it to safer ground.

As Mark, Kyle and Daisy plan to make a personal attack on Ryan, the FBI receives a tip leading them to a secret location, which gives them a leg up in the case.

On the day of an important trial, things go awry, causing the FBI to split up to hunt down a missing person. With his team breaking apart, Ryan enlists the help of a former enemy to defeat a greater one.

Callie meets her grandfather, which gives her a new perspective on Robert. Meanwhile, Mariana gets ready for a crucial dance-team showdown; and Jude stands up for a friend.

Paul, Ragosa and Kenny care for a quarantined patient exposed to radiation; TC, Drew, and Gwen race to the site of a multi-victim car cash; a former patient harasses Jordan; Joey pushes Krista to take her future into her own hands; Drew struggles with his recent breakup and TC gets an unwelcome surprise upon his return to the ER. ''Note: This episode and episode 6 aired out of order, resulting in some inconsistencies.''

January Jones (Mad Men (2007) and The Last Man on Earth (2015)); golfer Bubba Watson. Also: Brandon Flowers performs; Villanova piccolo player Roxanne Chalifoux sits in with The Roots.

The knockout round opens with top team members selecting their own song to perform individually.