An interesting clip in which the music of the BBC Radiophonic Workshop appears as music within the story itself. Tony Beckley cuts a Durand Durand-ish figure as villainous horticulturalist Harrison Chase... in which case, it's perhaps best not to ponder too deeply the effect his knob-twiddling is having on the plants.
Correction: the music here is actually by Geoffrey Burgon, not The Radiophonic Workshop! Thanks to The 222 Ronnies for pointing that out. You catch my drift though!