Tonight’s television highlights include the final instalment of Anthony Horowitz’s mystery trilogy, the first live episode of Strictly Come Dancing, and dramas exploring the space race and France’s Belle Époque. Other options include a second series of an irreverent Welsh animation, a British Saturday Night Live hosted by Amelia Dimoldenberg, and Charli xcx’s mockumentary The Moment.

– Marble Hall Murders: Lesley Manville plays book editor and amateur detective Susan Ryeland, who becomes involved in a murder case spanning multiple timelines.
– Strictly Come Dancing: The first live show features 15 couples, though there is no public vote this week.
– The Space Race: A historical drama begins with the development of Germany’s V2 rocket and its eventual impact on the American moon programme.
– Memento Mori: The French period drama continues its mix of dark intrigue, absurdity and recurring deaths.
– The Unbearable Wrongness of Being: The animated comedy returns to Ebbw Vale, where increasingly surreal seaside mishaps unfold.
– Saturday Night Live UK: Amelia Dimoldenberg hosts, with Rachel Chinouriri providing the music.
– The Moment: Charli xcx’s mockumentary examines fame, her 2024 “Brat summer” and preparations for a major arena tour.
– Live sport: The schedule includes the Laver Cup, Nations League matches involving Scotland and England, rugby union and a Super League semi-final.