Doctor Who Vs. The Agatha Christie Hour, Part 1

Originally shown on ITV in the
autumn of 1982, this period
drama series from Thames TV
comprised ten, stand-alone
plays based on the Queen of
Crime's short stories.
The first and fifth serials were
adapted from the Paker Pyne 
Investigates volume (published
in 1934), the second derived 
from The Regatta Mystery 
(1939), the third was taken 
from The Listerdale Mystery 
(1934), and the fourth originated from The Hound of Death collection (1933). A repeat showing of the first half of the run concluded on Sky Arts today - it featured a total of eighteen Doctor Who cast connections:

The Case of the Middle-Aged Wife (TX: September 7)

• [William] Maurice Denham (Parker Pyne here & The Case of the Discontented Soldier; Vladirovsky for The Man Who Was Number Sixteen; DI Japp in The Alphabet Murders; Poirot for The Mystery of the Blue Train, 1985; Crackenthorpe in 4.50 from Paddington, 1987; Pennyfather for At Bertram's Hotel, 1995) was Azmael in The Twin Dilemma, then voiced the President for The Paradise of Death 

In a Glass Darkly (TX: September 14)

• Jonathon Morris (Alan) was Chela in Snakedance
• Elspet [Jean MacGregor] Gray (Mrs Carslake here; Miss Penn in Doubble Sin) was Chancellor Thalia in Arc of Infinity, and voiced Hera for Big Finish's Immortal Beloved (2007)
• Nicholas Le Prevost (Wainwright here; Porter in Taken at the Flood, 2006) voiced the Barber Surgeon for The War Doctor Begins 4 (2022)

The Girl in the Train (TX: September 21)

• Sarah Berger (Elizabeth) was Rost in (part 2 of) Attack of the Cybermen
• James [David] Grout (Rowland here; Ralston in The Mousetrap, 1959; DI Craddock  for A Murder is Announced, 1977) voiced Ian Chesterton for Whatever Happened to Susan Foreman?
• Ron [Henry] Pember (DI Jarrold here; Ferryman in Ordeal by Innocence, 1984) voiced Seedle for Slipback
• David [Henry] Neal (Osric here; Vizzini in The Adventure of the Italian Nobleman) was the President in The Caves of Androzani
• Arthur [James] Blake (Sturm) was Hrhoonda in The Web Planet (2)
• Harry Fielder (Guard here; Policeman in Agatha; Henchman in The Secret Adversary, 1983; Assistant in Thirteen at Dinner, 1985; Tombola Man in Dead Man's Folly, 1986) was Guard (in serials PP, ZZZ, 4L, 4P, 5A, 5F, 5Z), Crewman (5S, 4T), Vogan (4D), Assassin (4Q), Tigellan (5Q), and Krarg in Shada

The Fourth Man (TX: September 28)

• [Francis] Michael Gough (Durand here; Judge in Witness for the Prosecution, 1982) was the eponymous entity in The Celestial Toymaker, and Councillor Hedin in Arc of Infinity
• [Manfred] Frederick Jaeger (Count here; Melchett in The Body in the Library, 1984; DCI Davy for At Bertram's Hotel, 1995) was Jano in the Savages, Sorenson in Planet of Evil, and Professor Marius in The Invisible Enemy
• Stuart Fell (Juggler) was Stuntman on Terror of the Autons (1) and The Ribos Operation (1), then fight arranger on The Talons of Weng-Chiang and State of Decay, and had roles in thirty-three other episodes (from The Claws of Axos to The Invasion of Time)
• Cy Town (Porter here; Passenger in Nemesis, 1987; Spectator in The Disappearance of Mr. Davenheim) was an uncredited Extra in thirty-five episodes (from The Silurians to The Curse of Fenric) and was Dalek operator in every Dalek story from Frontier in Space onwards

The Case of the Discontented Soldier (TX: October 5)

• William [Charles Anthony] Gaunt (Wilbraham) was Orcini in Revelation of the Daleks 
• Derek [Ralph] Smee (Waiter here; Auctioneer in Dead Man's Mirror) was Ransome in Spearhead from Space
• Lewis Fiander (Reid) was Tryst in Nightmare of Eden
• Peter Brayham was stunt co-ordinator on The Christmas Invasion, New Earth and School Reunion