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  • title card: white all caps text reading 'THE BIG THINKER' superimposed on a croner of the lab, showing a maniframe computer rack and cooling pipe
  • Dr Kearns plays cards, unaware that his mathematical ability will not help him in a rigged game
  • Dr Clemens is found dead in one of the ducts, Dr Kearns peers in from the far end
  • Cathy and Steed hold Broster and Clarissa at gunpoint after disarming them
  • Farrow sees his own name on the printout identifying the killer
  • Steed's bag is packed for a mission in Tel Aviv and tagged with his Carruthers alias

Series 2 - Episode 12
The Big Thinker

Teleplay by Martin Woodhouse
Directed by Kim Mills


click a name to see the face
John Steed Patrick Macnee regularNew Avengers007
Catherine Gale Honor Blackman regular007DangermanDoctor WhoThe Saint
Dr. Jim Kearns Anthony Booth The ProfessionalsThe Saint
Dr. Clemens Walter Hudd
Dr. Farrow David Garth regularDoctor WhoThe SaintAdam Adamant
Dr. Hurst Tenniel Evans regularDoctor WhoThe SaintRandall and Hopkirk
Broster Allan McClelland regularThe Saint
Clarissa Penelope Lee Carry On..Doctor Who
Janet Lingfield Marina Martin Doctor Who
Blakelock Ray Browne regular007The Saint
Nino Clive Baxter
Dr Brensall Johnson Bayly Doctor Who
Sheba Sheba regular
teenager unknown
teenager unknown
teenager unknown
butler Malcolm Watson regularDoctor WhoCallan
card player unknown
card player Walter Swash regular
card player Billy John regular007The Saint
card player David Wolliscroft regularDoctor Who
card player's wife unknown
hostess unknown

The script, along with revealing that Johnson Bayly played Dr Brensall, lists:
+ 7 men, 3 women extras as: crowd in Pin-table Arcade; waiter in Common Room; guest at Gambling Party; double for Steed's hand.

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