Ian Hislop is joined by comedian Phil Wang and Paul Merton is paired with mathematician Dr Hannah Fry for this week's edition of the show, which is presented by Alexander Armstrong.
Auggie and Mo help recite their naptime Christmas story when the pages of their book go missing.
Bingo and Rolly go on a mission to help Santa and Mrs. Claus replace the lights on their friend's Hanukkiah.
Mission Control uploads a virus onto the Odyssey in an attempt to take control. Matilda fights back by shutting everything down. Now floating in darkness with the very real threat of death, the true vulnerabilities of the kids comes to light.
Victor worries about Adam's future. Christine reunites with Nina.
The mysterious symbol of the keyhole exists in mystic texts, sacred architecture and ancient artwork found all over the planet; exploring if this cryptic shape represents a profound connection to the cosmos.
Simon is tormented by the mermaid's increasing demands for a blood payment. Stan suspects that the Masire brothers are behind Jazmine's disappearance.
Magnum and Higgins’ new clients hire them to find their missing brother last seen on the island, leading to Higgins being shot and TC abducted when a secret case of revenge is revealed during the investigation. Also, Higgins (and Magnum!) are surprised when her surgeon asks her out.
At sleep-away camp, Jessi befriends her trans cabinmate, and Nick discovers his two best friends have a little too much in common.
A trippy haunted house hosted by Kappa Kappa Kill forces each of the friends to reckon with their biggest fears.
On a trip to the 9/11 museum, Nick and Andrew sneak off to meet Jessi, Devon teaches Missy about code-switching, and Coach Steve gets a rude surprise.
The day Mo Masire is released from prison, police officer Jazmine pulls him in for questioning. She wants to use him to get to his brother, Simon.
Selena celebrates her growing successes — including an album going gold — but fights to get an English album produced. Suzette meets someone new.
Menzi's daughter Zaza vows revenge. Keneilwe confronts Simon about his deal with the mermaid. The family plots to bring Mo back into a life of crime.
Simon and the Kings plan their next heist. Mo agrees to do the job, under one condition. Zaza forces Mimi to try and set up a meeting with Tlotlo.
Amid financial strife, Abraham Quintanilla prioritizes his 8-year-old daughter Selena's musical talent and has her start a band with her siblings.
Tlotlo takes things into his own hands when Simon reprimands him for running illegal poker games out of the club. Mo brings Phumzi to a family dinner.
While tailing Simon, Mo finds out that his brother has a hidden family, but that's not his only secret: A mermaid appears to Simon and demands blood.