In this Christmas-themed episode, Olive and Otto help Santa track down his reindeer when they are accidentally shrunk. Also, Oscar helps Ms. O get off Santa's naughty list by making sure the number of nice things she has done is greater than the number of naughty.
A man from the future visits the boys and reveals himself as Kaz twenty-five years from now. Future Kaz warns the boys of an evil villain wreaking havoc on the future.
When a man is electrocuted, Murdoch is led to inventor Thomas Edison.
A self-proclaimed prophet from Utah territory sets his eyes on Kelly. Isabelle tries to orchestrate their union to get her hands on the prophet's money.
The Snow Queen attempts to pit Anna and Elsa against each other; with her powers out of control, Emma seeks assistance from Gold; Regina's quest takes a surprising turn.
Rules and morals have been tossed aside by new enemies. Rick will try to find a peaceful agreement, but they might prefer violence.
A shocking revelation proves how terrifyingly manipulative Paul Spector can be.
When Jake and Amy have to stay overnight at a hotel for a case, Jake invites Sophia and Amy's boyfriend Teddy over, but the move backfires.
Emily and Victoria learn that information is the most dangerous weapon while Nolan offers up information of his own in order to salvage his reputation.
The CSI team find themselves taking a look into the kinky world of “rubber dolls” as they investigate the murder of a man stabbed in an alley.
Facing a court subpoena and possible incarceration for contempt, Will stands firm in refusing to reveal the source of the stolen DOD documents. As Charlie's disdain for Lucas grows, Sloan and Mac scramble to find a more acceptable 11th-hour buyer for ACN. Jim's relationship with Hallie is put to the test by her new job at Carnivore, a start-up website.
Jane and Lisbon decide to keep their new relationship a secret from their colleagues as they investigate the murder of an undercover agent. Also, young, ambitious agent Michelle Vega joins the team.
Hannah is determined to find the missing Tom Parfitt and is convinced he's in Scarborough.
Bob enters a burger-making contest, only to discover that his distinguishing ingredient is missing! To help out their dad, the kids go on a mission to find the ever-so-important black garlic.
When the Cain family moves into an Ohio farmhouse, they soon find out their idyilic home and property are haunted by ghosts of a brutal murder and a deadly blaze
Walt has a business proposition for original Ghostbuster, Ernie Hudson; a customer wants to sell cartoon shampoo bottles from the 1960s.
Pressure mounts on Felix, Jake and Sam as they are questioned by the police about Andy's disappearance. Meanwhile, Oscar tries to locate the Book of Shadows by making a connection to Alice.