I have no idea how they do it (perhaps they have a selection of pictures of songwriters in compromising positions) but they have interviews with an amazing range of people. There are 69 podcasts at time of writing, many of them famous but there are a lot that I think “Who is that?” I then check them out and find they have written loads of songs that I love. For example Barry Mann and Cynthia Weil who wrote ‘You’ve Lost That Lovin’ Feelin”, ‘On Broadway’, ‘Saturday Night at the Movies’, ‘We Gotta Get Out Of This Place’, ‘Don’t Know Much’, ‘Just Once’, ‘Here You Come Again’ and ‘Somewhere Out There’. There are loads more people like this who write classic songs, all the way from the Brill building up to more recent times.
There are also more recent writers that I haven’t heard of but I know their songs, check out the chat with Eg White, he sounds great fun. There are also loads of singer songwriters that you will know Chris Difford, Glen Tillbrook, Rufus Wainwright, Billy Bragg and Tom Robinson. There are so many classic song writers in the list that you owe it to yourself to take a listen.