It's mainly talking, but they also put up a lot of pictures of the stuff they're talking about like records, or shops or venues etc.
Generally, they kind of start with a person's formative experiences and how that led them to be involved in dance music.
A lot of different music and scenes get discussed, and what kinds depends on the guest, and CW also talks a lot about his own history and ties together a lot of different strands of different music and scenes.
If a person listens from the start, would hear talk of everything from free-improv to punk/post-punk to early electro to acid house to pirates to well-known radio figures like the Colins.