Hammond, C. (Presenter). (2018, June 12). All in the Mind [Radio programme]. BBC Radio 4. https://www.bbc.co.uk/programmes/b0b5t826
The citation in your text will be:
(Hammond, 2018), or if you have quoted directly, it would be e.g. (Hammond, 2018, 11:53) i.e. quote starting at 11 minutes and 53 seconds in.
If you have used the programme's name in your sentence then only the year of publication is placed after it in brackets, eg
In an episode of All in the Mind, Hammond (2018) interviewed ...
Hammond, C. (Presenter). (2009, August 10). Harlow’s Monkeys. In Mind Changers [Radio programme]. BBC Radio 4. https://www.bbc.co.uk/programmes/b0b7fj3j