It's a solo show by Humphrey Ker, of whom I had not previously heard, narrating a wartime tale of skulduggery and derring-do. Apart from an occasional costume change or loud bang, most of the humour relies on deadpan delivery, anachronism and funny accents. In short, just the sort of thing I like. (Typical example: "She had flaming red hair; full, red lips; and those pointy breasts we all seem to be really into back here in the 1940s.")
Go along, go on! It's only an hour. And there's a dog in it.
(Dymock Watson was a real person, incidentally.)