Nelson calls on Jean when a politician's drug-fueled night with an escort ends in tragedy; Maddy plays truant on the same day Julie opens her new business; Jean discovers a terrible secret about Victor.
Towerblock is put through his paces after challenging Rocket to a battle of the fittest.
Jimmy shows Chuck that he's willing to do almost anything to win a case, even if it means getting his hands dirty.
Hunters journey into unknown, hostile areas of the swamp. One team, acting on a tip from a local buyer, heads to an area believed to be cursed. Another team visits a hazardous storm-altered marsh to fight numerous dangerous gators on dry ground, while another hunter is hell bent on hauling in 32 gators in one day.
Penn and his team are zapped into a world where they are enormous yet misunderstood monsters. They must convince the human President of a nearby island city that the monsters mean them no harm.
The guys attend a KISS concert; Walt lives out his childhood dream of meeting Gene Simmons.
With the mole on the run, a devastated squad turn on each other, and on themselves.
Nelson reveals details of Jean's first clean-up job; Martin makes plans to leave London after learning that French gangsters are following him.
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.
A patient arrives with radiation poisoning, spinning the night shift into chaos and putting it into lockdown. Meanwhile, staffers speed to a serious car crash, where they discover an injured police officer, TC's troubled sister-in-law visits, and a former patient harasses Jordan.
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.
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.
Bella seeks Sophie's help to prepare for an oral exam in Spanish class; the boys find a mysterious list that fell out of Pepper's locker.
Germaine's underwear situation traumatises the only male in the Garry family, seven-year-old Wyatt, prompting an emergency shopping trip up town.
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.
On election day, Dr. Ogden faces a setback; Murdoch investigates a murder with national security implications.
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.
Emily strives to clear Jack's name; Louise and Nolan are visited by officer Ben Hunter. Emily thinks Margaux is behind it. Jack's mother comes to defend him. And with Emily they try to prove Jack's innocence. Emily asks Victoria to talk Margaux.