Disco space pirates in bubble helmets! Drug-addict corpse knights! The universe's most ancient radioactive dog hospital! It could only be the classic Doctor Who story Terminus!
For a great post on the Wayne Barlowe influence on the Garm, check out Siskoid's blog. It doesn't mention the Dilbian, though, which is another good candidate. We've got an image up on the blog if you want to check that out.