Stage direction: [DING] Ding! [DING] Ding! [DING] Ding!

Did I fool you? I hope so. I love whodunnits, they are my trashy fiction of choice, especially the 'golden age' thirties and forties ones, and I've wanted to do a whodunnit episode of Cabin Pressure for ages...

Another new episode of a refined sitcom that bathes in a ridiculously good cast: alongside writer John Finnemore are Stephanie Cole, Benedict Cumberbatch and the man I refer to simply as 'The Guvnor', Roger Allam. This one's a bit special, boasting as it does the sort of tricksy, quadruple-crossing story that comedy writers often like to attempt but don't usually have the sheer plotting muscle to pull off. Finnemore has those chops. When Carolyn (Cole) entrusts Martin (Cumberbatch) to stop Douglas (The Guvnor) stealing some expensive whisky, a mystery worthy of Miss Marple unfurls. Sadly, Martin's investigating it instead.