About twenty years ago, there was a wonderful Horizon documentary, 'Dr Bonner and The Slime Moulds'.
This was an era when Horizon was at its best. Amazing things, and some bloody good science for a popular audience.
The slime mould thing was rather special. A specialist niche that had you thinking very hard at what happens around you.
It's sad to think of the Horizon slot now. It's often very bad.