"Doctor Novak" as a Pole would spell his surname "Nowak". The W in Polish is pronounced as a V.
Sergeant Brooke is collecting money for the football pools, and asks Foyle for "a tenner". In England this means ten pounds, which would have been a huge amount of money during wartime, two or thee weeks' pay for an average man.
No, he asked for a tanner, not a tenner. Sixpence.
No, he asked for a tanner, not a tenner. Sixpence.
Foyle has been presented in this and earlier episodes as a chess lover. However he and Dr. Novak, whose uncle was "champion of Poland", play a bizarre opening (with a possible move sequence 1. e4 e5 2. b3 b5 3. Na3 Na6 4. Nxb5) that no-one familiar with basic principles of chess would play.