Does anyone have a collection of interesting podcasts to listen to?

I am looking for a collection of podcasts on the topic, one in particular. I like to re-listen to things, past and present but i’ve been really bad at keeping links etc. The one podcast or radio show in particular I would like to listen to again but need help finding it. The show had a guy on talking about how he had high security clearance etc, one particular part of the show he mentioned one of the reasons for a cover up is because it implicates a specific race of people on earth and he wasnt willing or able to go into further detail about it due to his clearance still being held It was a British man talking iirc and was a quite old. Anyone able to help me find this again?