They include radio voice overs (some use of expletives in some narratives), narratives, electronic music, percussion, and other forms of music.
You may want to start with: Hail Zeon! - Super Science
Tales From The Doorstep
4 haunting tales of magic and super science. Join Hail Zeon!, Richard Pickman and Durka Dub on a journey along knowledge and madness.
A full sized sequel to the "Doorstep EP", Tales From Doorstep is a creepy mix of strange Space Opera from The Masters Of Space Opera.
I suggest you start with Chapter XV - Revenge Spells prt.2
The Lovecraftian EP, featuring Hail Zeon! and Richard Pickman , takes Space Opera through dusty libraries, distant times and even Antarctica.