When clues in a murder implicate Castle and Beckett's nemesis, Dr. Kelly Nieman, Castle is called in to consult on the case.
Sharon's parents visit from Ireland and have a strained introduction to Rob. More health complications create stress for them both, and Rob's secret friendship with Chris explodes in his face.
When boat traffic makes it impossible to run lines, hunters must adjust tactics and abandon plans in order to fill their tags.
The squad becomes involved in a feud with firemen; little mistakes cause consequences.
Ceaser has second thoughts about his ex-flame. Meanwhile, Sky sets out to teach Ceaser a lesson about love. Also: A baby arrives.
The SUR crew comes together to celebrate Scheana's wedding day, but Scheana experiences a meltdown as the day of her dreams turns into a nightmare; James confronts Kristen over her continued obsession with Tom Sandoval.
Team Scorpion goes undercover on a cruise ship to locate and disable deadly stolen rockets. Meanwhile, as Valentine's Day approaches, Toby and Happy help Ralph, who is in the throes of his first crush.
Gordon and Bullock set out to stop Gerald Crane, a biology teacher who has been harvesting the glands of his murder victims. Meanwhile, after finding herself in an unusual setting, Mooney continues plotting to gain power, and Falcone attempts to change Maroni's plan for the Penguin.
It's been 10 years after the events of the present, and Phineas must decide what university to go to. After discovering that Isabella had a crush on him for years, Phineas must reach her before she leaves for college and express his true feelings for her. Meanwhile, Doofenshmirtz has a mid-life crisis.
Christmas Automotive rebuilds a DeLorean; a local drag racing legend seeks help in rebuilding his '64 Chevy Nova that runs on alcohol.
A medical problem could cause Jane to miss her graduation. Michael believes that he has identified Sin Rostro.
Jack Whitehall and his father Michael look back at some of the highlights of the series.
Ichabod and Abbie face demonic creatures that guard a secret crypt and encounter Thomas Jefferson in their quest to fight evil. Meanwhile, Jenny learns a shocking secret about Frank Irving.
George wants to make his friends the best Valentine's Day card ever, but even with four paws, it takes a long time to create homemade cards for everyone. With a little help from sponge shapes, red paint, and a waffle iron, George creates the first ever monkey Valentine's Printing Press!
The biggest beasts on the roads are trucks and when things go wrong, everyone knows about it.
K.C. reluctantly agrees to try out for cheerleading with Marisa so they can spend more time together. Meanwhile, Craig tries to bond with Ernie over sports, but quickly learns his son's gaming skills are better online than on the field.
After being reunited with her comrades, tension rises between Ange and Jill as she continues to pursue Operation Libertus.
The remaining cooks fight to keep their white aprons and their dreams alive.
The Nine-Nine is invited to a terrorist training drill with Homeland Security, but the precinct's role as hostages doesn't go over so well.
After discovering his checks are actually a large size post-it pad, Peter demands he have access to the checking account. While at the bank, Peter & Lois discover that his first name is actually Justin, so Peter embraces his new partying “bro” lifestyle. Meanwhile, Joe arrests Glenn after he sleeps with an underage girl, which leads to an unexpected reunion.