On the opening night, it had all gone terribly wrong.

‘It wasn’t my fault,’ he told me. ‘It was all so bloody unfair! I did everything by the book … producer’s notes, control and management procedures, emergency plan. We’d spoken to the police, the local authority, the local fire authority … I couldn’t have done any more. There was a full investigation afterwards. I spent hours being questioned and, in the end, everyone agreed that I was in no way to blame. Of course, the play closed immediately … not that it mattered. I will never forgive myself for what happened to Sonja. It was horrible.’

‘Was she killed?’ I asked.

‘No.’ He looked at me sadly over his glass. ‘But she was very badly injured: it was the end of her career. And mine! Nobody wanted to know me after that. I had two productions cancelled even though I’d already signed the contracts. It was as if I’d lit the bloody match! And look at me now. I mean … Ahmet’s decent enough, but he’s not exactly Cameron Mackintosh, is he!’

And what of the cast?

I have already mentioned Jordan Williams, who had agreed to play Dr Farquhar and was undoubtedly the star of our show. He was a Native American, the first I had ever met; a Lakota to be exact. I’d looked him up on Wikipedia and discovered that he had been born on the Rosebud Reservation in South Dakota in the USA. He had spent ten years working in Los Angeles and had received an Emmy nomination for his role as a psychopathic killer in American Horror Story. He had married his make-up artist, who happened to be English, and that was what had brought him to the UK. When he had first arrived, many of the newspapers had suggested that he might take over from Peter Capaldi as the first ethnically diverse Dr Who, but this hadn’t happened. Instead, he had taken on multiple roles in theatre, film and TV and if he wasn’t quite a household name, he was certainly respected.

I never feel at ease with actors and this was particularly true of him. He was a thickset, broad-shouldered man with extraordinarily intense eyes; I could feel them boring right into me every time we spoke. His face was defined by features that had a sort of mathematical precision, with a very straight nose and a square chin. He had greying hair that wasn’t quite long enough to be called a ponytail, but which he still tied back with a coloured band when he wasn’t onstage. He was by far the oldest member of the cast, but he wore his age well, sloping into rehearsals in tracksuits or jeans, his hands deep in his pockets, his thoughts far away. When he spoke, he chose his words carefully, with no trace of an American accent. It was as if he was performing … and this was in fact his defining characteristic. It was very hard to tell when he was acting and when he wasn’t – sometimes with unfortunate consequences.