Best ever medical opinion song

[ZombieCake]

Managed to avoid the Leech-Meisters for a while now.  So I'll start with the following.  It's quite a long tune and rather nice if you like that sort of thing, but there is a spoiler alert in the title.  Here goes, and as ever, any takers...

https://www.youtube.com/watch?v=OKRJfIPiJGY&list=RD6NUArfACdmQ&index=16