I was looking forward to getting to this radioplay. It wasn't one of my favourite books when reading it, I don't think, but I'm already very attached to Peter and Harriet, while listening to the radioplays, and I knew that this would be a crux of both characters' development. I believe this was recorded a long time after the others: certainly, Ian Carmichael remains wonderful but you can hear age and tiredness in his voice. He's not quite so jolly and smooth as he used to be. Not enough bounce to still be the perfect Peter Wimsey, I'm afraid. Still, it would've sounded wrong to have anyone else do it.
I'll confess that I was mostly hanging on for the bits about Peter and Harriet. I wasn't so fond of the way this was narrated, by Harriet, instead of being a radioplay in the same style as the others. That made some of the transitions feel a little clunky to me -- but the ending made up for it all. Oh, Peter.