Set in the past, Onyx issues an annual ruin Christmas challenge. The villain family breaks up into two teams to win it all but gets more than they bargained for.

On Chance's birthday, George throws a party, and Rosie's sisters throw shade.

Guest shark Daniel Lubetzky. An exciting way to feed hummingbirds. An entertaining product to ease anxiety and reduce stress. A fire-defense system. A wearable and eco-friendly fitness design makes it easier to sweat. Robert Herjavec gets an update on Basepaws.

Bethlehem, 1988: Teenage Dwayne is locked in a restaurant overnight with his father when Rocky agrees to deep clean the space. In 2033, Dwayne feels nostalgia for a vintage arcade game he finds far from home.

Guest: comedian Brad Sherwood.

Magicians Luka Vidovic, Connor McDonald & Kenshin Amagi, Marc Desouza, and Kevin Micoud try to fool the veteran duo with their illusions.

Bash's psychiatrist suggests an unexpected form of therapy. Mags gets evicted and meets an old patient who holds a grudge. Theo makes some questionable choices with a patient's mother. June's personal and professional worlds collide.

Bode's crew is accused of stealing a designer watch from a fire mop up, and the crew responds to a high-stakes call about an extremely dangerous gas leak.

Parker hauls Big Red into the massive Bear Cut as the team chases an epic milestone. Tony hits a roadblock on the Hill and taps out a honey hole.

A father-to-be kicks off a dangerous vehicle pursuit over something trivial. A car that ducked out of a DUI checkpoint attracts attention. Officers respond to a disturbance caused by a local man's erratic behavior.

When an intruder breaks into the home of a Hollywood actress, Hondo and the team are forced to partner with an old nemesis - former 20 Squad leader Sanchez - to track down a dangerous criminal who'll stop at nothing to get what he wants. Also, Tan struggles to find the perfect anniversary gift for his wife.

Erin and Anthony clash when Anthony's daughter, Sophia, is the sole eyewitness to a fatal shooting. Also, Frank wants to punish an off-duty copy for his inaction during an armed robbery; Danny and Baez investigate a violent mugging with some unwanted help from Jamie; and Eddie and her partner, Badillo, help an attack victim see the brighter side of New York City.

Jackson Lamb is on high alert after a former spy is found dead. Min and Louisa are tempted by an offer from outside Slough House.

Gamache earns the displeasure of General Director Francoeur when he ignores his superior's orders and begins investigating the disappearance of Blue Two-Rivers. As a punishment, he's dispatched to the remote village of Three Pines to investigate the murder of a wealthy socialite named CC de Poitiers, where he soon discovers everything is not as it seems and he has no shortage of suspects.

Jimmy pens his weekly Thank You Notes, then catches up with Kevin Bacon and Theo James before welcoming stand-up comedian Jay Jurden.

Poppy begrudgingly takes feedback from Dana about her work. Carol, Brad, and Rachel navigate the aftermath of their monetization gambit.

Snoopy adapts a Christmas poem to help Sally sleep; Charlie Brown makes gifts for his pals; and Snoopy can't wait to open his presents.

Trying times bring Kate and Tully together as they contend with an overbearing grandma, a pesky new intern and an ex-husband in distress.

Allie is forced to complete a dangerous task for Casa Roja's landlord. An unexpected guest throws Margot and the kids' lives into disarray.

Maximo is tasked with taking care of a billionaire investor. Chad and Julia discover a secret about Diane.

Lamb liaises with a Russian defector who may hold a clue to sleeper agents. River is on the trail of a ruthless assassin.

Lev sabotages Flynne's treatment. Ash finds an unlikely ally. Wilf discovers some unsettling truths about Aelita. Flynne tries to save her world from Cherise.

Lin's past catches up with him when Nightingale arrives. Later, Lin makes a shocking discovery. Karla offers Kavita information for the article.

Following their mom's death, two sisters renovate a neglected house they've inherited from her. But when one of them suspects their mom may be haunting them after a series of unexplained occurrences, it leads to a sinister discovery.

Mack gets involved in an illegal tobacco trade to get the money he needs for a new identity while preparing to conduct a funeral for one of Clump's most beloved figures.

As Tiffany tries dating apps and Leon attempts to raise cash cryptocurrency trading, the two bond over Post-its when things don!t work out as planned. Tiffany pays Richie a visit in prison.

Bambi loses the guerilla's trail and reacquaints himself with whiskey. Prince recovers from his wounds and starts putting the mess behind him.

When Ashley makes a mess in Gordon's sock drawer, she makes an impromptu trip to Costco with Colin, Megan and her mother, to buy Gordon some new furniture.

Gamache realises that the key to solving CC's murder lies in her enigmatic past. Discovering that one of the villagers has withheld from him a key piece of information, he is able to crack the case. Meanwhile, Gamache's delight at making a breakthrough in Blue's disappearance is short-lived as the Two-Rivers family rejects his evidence and the anguished Missy is driven into a desperate act.

The Musicals Week results show opens with a Guys and Dolls routine. Two couples face a dance-off to secure a place in the semi-final, and there's a guest appearance by the stars of The Cher Show.