TV tonight: an ice-bath warm-up for Scotland’s wild swimmers Jules and Greg

The married couple jump into cold water in Glasgow and Edinburgh. Plus: Ben Fogle encounters stone-age living. Here’s what to watch this evening

8.30pm, BBC Two
In case you’ve missed it in the Guardian’s pages over the past 10 years, wild swimming is really good for you! Julie Wilson Nimmo and Greg Hemphill are testament to this – they have been married for 25 years and seem very happy. In this six-parter, they explore the best cold water spots across Scotland, starting with urban locations in Glasgow and Edinburgh. But first, they must “warm up” by plunging into an ice bath for something “colder than you’ve ever experienced” for more than 10 minutes. Hollie Richardson