Finish guest star Julia McKenzie. The Secret
of Chimneys (published in 1925) does not
actually feature Marple - this version used elements of The Herb of Death from The
Thirteen Problems anthology. The Blue
Geranium also appeared in that volume,
released in 1932. The Mirror Crack'd from
Side to Side was based on Agatha Christie's
eighth Marple novel, issued in 1962.
The season opened with The Pale Horse, in
August 2010, whilst the remaining serials
were shown over the following Christmas
period. A repeat run of these festive specials
began on ITV3 today - they featured a total of
thirty Doctor Who cast and crew connections:
The Secret of Chimneys (UK TX: December 27 2010)
- Michelle [Daniella] Collins (Treadwell) was Captain Kath McDonnell in 42, then voiced Winnie Tyler for Big Finish's Damaged Goods (2015)
- Dervla Kirwan (Bundle here; cast in The Last Seance) was Mercy Hartigan in The Next Doctor, then reprised Miss Quill for Class 3, and voiced Mrs. Calderwood for Aimed at the Body, Yost McCormack for Lightspeed, Di Wright for The Bookshop at the End of the World, Anne Marie for Interlude, Representative for Echo Chamber, Agatha Fernbridge for Towards Zero, Professor Callis for Castle Hydra, Kelleher for Effect and Cause (all 2020), and Lizbeth Hayhoe for Torchwood (2021)
- Charlotte [Leah] Salt (Virginia) voiced Sylvia Wimpole/Waveform/ Effy for Criss-Cross (2015)
- Nick Arthur was also the film editor on The Curse of Fatal Death and Hide
- for Matthew Tabern and Gavin Walters see A Pocket Full of Rye
- production runner Donna Shakesheff was the art department co-ordinator on every episode from Asylum of the Daleks to The Name of the Doctor
The Blue Geranium (UK TX: December 29)
- Joanna [Louise] Page (Hester) was Queen Elizabeth I in The Day of the Doctor, and Narrator of The Garden of Statues
- Ian [David] East (John) made his TV debut as Celation in (episode 2 of) The Daleks' Master Plan
- Claire [Louise] Rushbrook (Caroline here; Audrey for Towards Zero, 2010) was Ida Scott in The Impossible Planet and The Satan Pit, then reprised for Big Finish's Odyssey (2023), and voiced Tula Chenka for Escape from Kaldor (2018) and The Robots (from 2019), and the Abbess/Marna for Out of Time 1 (2021)
- Kevin [Robert] McNally (DI Somerset here; DI Japp in The ABC Murders, 2018) was Hugo Lang in The Twin Dilemma, then Professor Eustacius Jericho in Flux - he also voiced Henry for Spider's Shadow (2008), Vakrass for The End of the Beginning, and Merrick Kingdom for The House of Kingdom and The Lost (all 2021)
- Paul Rhys (Pritchard here; Upward in Mrs. McGinty's Dead) voiced Max Paul for The Scapegoat (2009)
- Hugh Ross (Carmichael here; Carter in The Yellow Iris) voiced Reverend Merodach for Night's Black Agents (2010), Robert Stretton for Industrial Evolution (2011), Vepaja/Thraskin for Voyage to Venus, Sir Toby Kinsella for Counter Measures, 1963: The Assassination Games (2013), The Reesinger Process and The Split Infinitive, Kyle Inskip for Masters of Earth (both 2014), Gethal for The Exxilons (2015), Charles Kirkland for The Trouble With Drax (2016), Narrator of Late Night Shopping, The Piltdown Man (both 2014) and Waiting for Gadot (2017), Oliver Barleycorn for Dead Plates, and Malcolm for The Keeper of Light (both 2022)
- Sharon Small (Mary) voiced Jeannie/Janet for The Revenants (2012)
- Derek Hutchinson (Concierge) voiced Altus for The Burning Prince (2013), the Usher for A Life in the Day, Brother Callis for Eye of Darkness (both 2015), Geoff Evans for Black Thursday (2019), and Dr. Brownlow for No Place Like Home (2024)
- Caroline Catz [born Caplan] (Hazel) depicted Delia Derbyshire in Arena: The Myths and Legendary Tapes
- Patrick [Bashir] Baladi (Frayn here; Cloade in Taken at the Flood, 2006) was cast in The War Between the Land and the Sea
- for Damian Timmer, Sean Clayton and Greg Bennett see The Body in the Library
- for Tom Lucy see At Bertram's Hotel
- Joanna [Lamond] Lumley (Dolly here & The Body in the Library; Helena in Innocent Lies) was the Doctor in The Curse of Fatal Death
- Lindsay [Vere] Duncan (Marina here; Lady Tamplin in The Mystery of the Blue Train) was Captain Adelaide Brooke in The Waters of Mars
- Martin Jarvis (Hogg here; Warburton in Dead Man's Folly; Narrator of Harley Quin, 2009-11) was Hilio in The Web Planet, Butler in Invasion of the Dinosaurs, and the Governor in Vengeance on Varos, then voiced Nigel Rochester for Jubilee (2003)
- Neil Stuke (Dr. Haydock; Baker in The Case of the Missing Will) voiced the titular villain/Geoff Corbett for The Crooked Man (2014), and was Lee Clayton in Fugitive of the Judoon
- Samuel Barnett (DS Tiddler) voiced Hans Tod for The Beast of Orlok (2009), Robin Yeadon for Nightshade (2016), Cicero for Tartarus (2019), Emlak for The Sublime Porte (2023), and Norton Folgate for Torchwood
- Hugh [Richard] Bonneville [born Williams] (DI Hewitt here; Masterman in Murder on the Orient Express; Strange in Towards Zero, both 2010; Ralston in The Mousetrap, 2012) was Captain Henry Avery in The Curse of the Black Spot and A Good Man Goes to War, and voiced Tsar Nicholas I for The Angel of Scutari (2009)
- Anna Andresen (Maisie) was Tsarina Alexandra in The Power of the Doctor, and voiced the Elementals for Light the Flame (2021)
- Olivia Darnley (Cherry here; Nurse in A Life in Pictures) was Kourtney in The Five(ish) Doctors Reboot, then voiced Emily Cole for Prisoner of the Ood (2018)