It’s Gina’s hen-do and her Maid of Honour has booked a large manor in the Peak District. All her friends should be here – including Yasmin Khan, who’s been mysteriously quiet whilst away on her travels. But Yaz is bringing a guest. Someone who isn’t invited. Someone who might prove a little disruptive. The Doctor is joining the celebrations. Unfortunately, so is an ancient enemy.

England, 1183 – The court of Henry II. The Doctor and Yaz gatecrash a right royal – if terrifyingly dysfunctional – family Christmas as Henry’s estranged wife Eleanor returns to spend Yuletide with the fam. The Doctor and Yaz uncover an imposter amongst them, but who are they really? And what do they want?

The Doctor and Yaz have been sent a list of coordinates, each one pointing to a location in time and space where people are disappearing - but why? The trail leads to a war-torn world, where conscripted humans battle the terrifying Banshee. Can the Doctor end this conflict before she loses her best friend?

The Doctor and Yaz arrive in the East End of London, 1926. There’s grief in the air: not only the years of war and sickness, but a more recent death. A strange message prompts them to investigate the murder of a medium. A young woman whose seances hide deeper secrets - and an unearthly power that threatens the entire city.

The Doctor and Yaz must infiltrate the Aegis Protectorate interplanetary defence expo in search of someone who has been dogging their travels. As the Doctor digs into the company’s main export - the sinister Trojan Program, Yaz faces a battle of her own. Will they finally uncover the truth about the Tourist?