Doctor Who Vs. Partners in Crime (1983)

British television's first adaptation of

Agatha Christie's classic Tommy and

Tuppence stories was produced by London Weekend Television - it starred

James Warwick and Francesca Annis as

the married crime fighting duo. 

Originally shown from late 1983, the

ten-part series was preceded by a
feature-length pilot.
LWT had earlier dramatised Why
Didn't They Ask Evans? (in 1980),
and The Seven Dials Mystery (1981).
Thomas and Prudence (nee Cowley)
Beresford first appeared in Christie's
second novel, The Secret Adversary,
published in 1922, whilst N or M?
was issued in 1941. This series was
named after the 1929 short story
collection.
Two further full length mysteries, 
By the Pricking of My Thumbs and Postern of Fate (the writer's final

work) followed much later, in 1968 and 1973.
Both The Secret Adversary and N or M? were reworked in 2015 (by

Endor Productions) for BBC1. The Corporation now owned the rights

to adapt Christie's works. Forty years after the writer's death, BBC

Content commissioned seven Agatha Christie projects.

The period drama (last repeated on the True Entertainment channel

in 2019) featured thirty-five Doctor Who cast and crew connections:

The Secret Adversary (TX: October 9 1983)

• Warwick (also Bobby Jones in Why Didn't They Ask Evans?, 1980; Thesiger in The Seven Dials Mystery, 1981; Lombard in And Then There Were None, 1988) appeared in Earthshock as Lieutenant Scott
• Honor Blackman (Rita) was Professor Lasky in Terror of the Vervoids
• Peter [Wynn] Barkworth (Carter) was Clent in The Ice Warriors
• George [Morris] Baker (Whittington here; DCI Davy in At Bertram's Hotel; Weston in Evil Under the Sun, 1998; Spence for Mrs. McGinity's Dead, 2006) was Login in Full Circle
• John [Alexander] Fraser (Kramenin here; Wargrave in And Then There Were None, 1987) was the Monitor in Logopolis
• Mike Elles (Clerk) was Gentek in The Face of Evil
• Norman Hartley (Florist) was Ulf in The Time Meddler, and Sergeant Peters in The Invasion 
• Harry Fielder (Henchman here; Policeman in Agatha; Guard in The Girl in the Train; Asst. Director in Thirteen at Dinner; Tombola Man in Dead Man's Folly) was Guard (in serials PP, ZZZ, 4L, 4P, 5A, 5F, 5Z), Crewman (SS, 4T), Vogan (4D), Assassin (4Q), Tigellan (5Q), and Krarg in Shada 
• Rocky Taylor (stunt advisor here; stunt driver on Ordeal By Innocence) was a stuntman on The Idiot's Lantern

The Affair of the Pink Pearl (TX: October 16)

• [Clement] Graham Crowden (Bruce here; Blake for Five Little Pigs,1994; Clithering for The Body in the Library & A Murder is Announced, both 1999; Macarthur in And Then There Were None, 2005) was Soldeed in The Horns of Nimon
• Arthur Cox (DI Marriott here; Dr. Hawker in Poirot) was Cully in The Dominators, then Mr. Henderson in The Eleventh Hour

Finessing the King (TX: October 23)

• Annie Lambert (Lady Merivale here; Valentine in Triangle at Rhodes) was Enlightenment in Four to Doomsday
• John Gillett (Dr. Stoughton) was the Gravis in Frontios
• [William] Pat Gorman (Commissionaire; Golfer in A Pocket Full of Rye; Reporter in Thirteen at Dinner; Sergeant in The ABC Murders; Man in The Case of the Missing Will) made appearances in eighty-three episodes (from The Dalek Invasion of Earth (1) to Attack of the Cybermen)

The House of Lurking Death (TX: October 30)

• Anita Dobson (Esther) voiced Eileen Klint for Big Finish's Blood of the Daleks (2007), then was Mrs Flood in The Church on Ruby Road
• Michael [Dundonald] Cochrane (Radcliffe here; Cartwright in Three Act Tragedy, 2003; Sir George in Dead Man's Folly, 2007; Whitfield in Murder is Easy, 2013; Wainwright in Witness for the Prosecution) was Charles Cranleigh in Black Orchid, and Redvers Fenn-Cooper in Ghost Light, then voiced Lieutenant Colonel Brook for No Man's Land (2006), Murgat for Brotherhood of the Daleks (2008), Colonel Hugh Spindleton for The Trail of the White Worm and The Oseidon Adventure (both 2012), Professor Chivers for The Time Machine (2013), and Geralk for The Fate of Krelos and Return to Telos (2015)
• Granville Saxton (Dr. Burton here; Casterman in Hickory Dickory Dock) voiced the Duke of Wellington for The Curse of Davros (2012)

The Sunningdale Mystery (TX: November 6)

• Denis Lill (Hollaby here; Sir Reuben in The Underdog; Blore in And Then There Were None, 2008; DI Lord in Spider's Web, 2009; Robarts in Witness for the Prosecution, 2010; Pennyfather in Murder on the Nile; 2012; Doctor in Crooked House, 2017) was Dr. Fendelman in Image of Fendahl, and Sir George Hutchinson in The Awakening

The Clergyman's Daughter (TX: November 27)

• prolific Big Finish actor Robbie Stevens (Cockwell) voiced Co-ordinator Storin and Nathemus 1 for The Brink of Death, Niles Bunbury and Frank Lewis for We Are The Daleks, Captain Unger, British Captain, Dutch and Chuadri for Criss-Cross, Johnny Repford, Director Pennard, Statue and Prosecutor for Prisoners of the Lake (all 2015), Polsbroek and Nix for The Waters of Amsterdam, Hurley for Peterloo, Boyarov and Vilal General for Quicksilver, Boswyck and Raspak for Order of the Daleks, Dantallian and Securitybot for Original Sin, Manners and Harker for The Woman in White, Melchester for Picture This (all 2016), Jellicho Wigg and Wilfer Wagstaff for Subterranea (2017), and Morris for The Helliax Rift (2018)
• Jane Booker (Monica here; Miss Cooke in Nemesis, 1987) voiced Dron and Yetana for How to Make a Killing in Time Travel (2018)
• Pam St Clements (Crockett) reprised her EastEnders role of Pat Butcher for Dimensions in Time

The Ambassador's Boots (TX: December 4)

• Jennie Linden (Cicely) was Barbara in Dr. Who and the Daleks, then voiced Professor Klyst for Unregenerate! (2005)
• TP [Thomas Patrick] McKenna (Wilmot here; Dr. Grahame in A Caribbean Mystery) was Captain Cook in The Greatest Show in the Galaxy 
• Clive Merrison (Richards here; Percival Fortescue in A Pocket Full of Rye; Strange for Three Act Tragedy, 2003) was Jim Callum in The Tomb of the Cybermen, the Deputy Chief Caretaker in Paradise Towers, then voiced George Augustus for The Contingency Club (2017)
• Catherine Schell [born Katherina Freiin Schell von Bauschlott] (Virma) was the Countess Scarlioni in City of Death
• Michael Carter (Rodriguez) made his TV debut in The Mind of Evil as Prisoner and UNIT Soldier

The Unbreakable Alibi (TX: December 11)

• Preston [Reginal Harper] Lockwood (Waiter here; Pennyfather & Simmons in At Bertram's Hotel, 1987 & 1997; Francois in The Chocolate Box) was Dojjen in Snakedance
• Stephen Wale (Attendant) was David in (part 1 of) Attack of the Cybermen

The Man in the Mist (TX: December 18)

• Linda [Virginia] Marlowe [born Bathurst] (Gilda) voiced Commander Claire Spencer for The Word Lord, May Carlisle for Casualties of War (both 2008), Osloo for The Macros (2010), and Gusta Pardo for The Tyrants of Logic (2018)
• Patrick Marley (Leconbury) made his TV debut as a Soldier in The Reign of Terror (6)

The Case of the Missing Lady (TX: January 1 1984)

• Jonathan Newth (Stavansson here; Hailsham-Brown in Spider's Web, 1982; Dr. Grainger in Dumb Witness) was Orfe in Underworld
• [Rosemary] Rowena Cooper (Irma here; Sarah in The Case of the Missing Will) was Angela Price in The Sarah Jane Adventures: Lost in Time, then voiced Emily Shaw for The Last Post (2012) and The Cloisters of Terror (2015), Mother Superior for The Unbound Universe and Ruler of the Universe (2017), Jean Bazemore for Jago & Son, and Queen Victoria for The Victorian Age, The Torchwood Archive (all 2016), The Death of Captain Jack and Jago & Litefoot Forever (both 2018)

The Crackler (TX: January 14)

• Shane Rimmer (Ryder) was Seth Harper in The Gunfighters
• David Quilter (Laidlaw here; Shaw in The Million Dollar Bond Robbery) was Greeves in The Unicorn and the Wasp
• Lawrence Davidson (Heroulade) was Draconian First Secretary in Frontier in Space (2)