The Test Tube series of videos is something I 'm very proud of.
The idea is to show science as it really is - warts and all.
Professor Seamus Garvey, from the University of Nottingham.
The first time I met him (five years ago) he told me about his dream of placing giant "energy bags" on the sea floor.
The idea is to store energy (probably from renewable sources) as compressed air, releasing it later when the energy is required.
Over the years I have made various films with Seamus as he works to make his vision a reality.
These have included videos about funding and early prototypes.
But this most recent video is something I'm very happy to see - foootage of divers attaching the first bag to the ocean floor!
There's still a long way to go - but it all seems very real now.
A far cry from that first discussion in Seamus' office!