Starring David Tennant (Doctor Who) and Janet Montgomery (Entourage), the two-part drama is a spy story set in Poland, Paris, London and Berlin in the years leading up to the Second World War.

Ian La Frenais commented: “We would love to do more – although Mercier [Tennant’s character] isn’t in any of the other novels. Alan Furst tends to use different heroes in different novels. That’s just his way.”

Co-writer Dick Clement added: “So we might be forced to write a sequel to this, taking it on without Alan Furst’s help. Because we leave Mercier at the beginning of the Second World War. We haven’t covered wartime in this one whatsoever.”

La Frenais replied: “So it’s a question of whether we do ‘the further adventures of Colonel Mercier’, or whether we go on to make other films in the Spies brand – Spies of Budapest and so on. It would be nice to put a sort of seal on it, so that audiences could think, ‘Ooh, good, THAT’S coming back…'”

Janet Montgomery also appears keen: “Definitely! I’d love that. Alan has written many different novels. And of course Dick Clement and Ian La Frenais, the writers who adapted Spies, have such an incredible track record, from TV shows like Porridge to films like The Commitments. I hope they would want to write more for us.”

Episode 2 of Spies of Warsaw airs at 9pm on Wednesday 16 January on BBC Four.

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