It had to happen. It's time for us to deal with the One Nigel Kneale Thing We Don't Like: Kinvig.

Joining us is comedy writer and performer Gemma Arrowsmith, whose new show Gemma Arrowsmith's Sketched Out has just dropped on BBC Radio 4, and we talk about why the live studio audience is going to find it funnier than we do at home, the wild transformation of situation comedy in the 1980s, and whether sci-fi nerds really have that much of a crossover with UFO fans.