When Julie's demanding pregnant friend visits, Todd's home life is disrupted; Todd reaches out to Lindsie.
Some shocking secrets are revealed by Rafael and Jane. Petra discovers another way to complicate Rafael's life.
When Sylvester accidentally triggers an explosive device during an investigation, Team Scorpion must focus on finding who's responsible even while their friend's life hangs in the balance.
An old heartbreaker flame of Toast's, Lorna Wynde, turns up in London, but is she still in love with him, or is she trying to make her husband, Josh Homme, jealous?
Crabtree and Higgins go under cover to investigate the murder of a vaudeville comic.
When the Slotter's miners and Ling's railway workers fight one another to control the mine, the women take sides resulting in loss on both sides.
Daniel's running the store when head office announce the canteen is no longer free. The staff are not impressed so Charlie takes them all out to lunch to take the heat off Daniel.
The team become involved in an investigation into the murders of Marines whose sons are at military academics.
Brandon looks back on Callie and Jude’s first Christmas with the Foster family.
Computer graphics, visual analogies and a recurring cast of expert scientists combine to reveal new aspects of the world you think you know, from canyons of gravity that warp space and time to rain triggered by cosmic rays.
Rebekah persuades Klaus and Elijah to take part in a family tradition from their childhood.
Dinah matures and experiences an intense love that leads to a devastating loss and alters her family forever.
A Hollywood comeback is interrupted when a former child star is found dead on skid row, leaving the director of the actor’s current movie and his manager as prime suspects. Flynn’s daughter comes to visit and the true nature of Sharon and Flynn’s relationship comes to light.
Greenshoots Academy is shortlisted to feature in a television documentary series.
Doc is determined to make a comeback with the Street Beast. Big Chief and Kamikaze decide it's time for the El Camino to race for the list. Farmtruck and AZN go after redemption with an old rival with the Dung Beetle.
As the Kennish and Vasquez families prepare to celebrate Christmas in their traditional ways, Bay and Daphne find themselves living each other's lives as if the switch never happened on an all-new holiday-themed episode.
When an ER physician is gunned down in the street, Castle and Beckett soon discover that the victim was a mob doctor to a Mafia family run by an old friend of Castle's. Also, against this backdrop of Christmas, Esposito and Lanie reach a defining moment in their relationship.