Original air date: 25 January 1995
The outline above shows a relatively complicated programme, a more detailed timeline can be seen in the text version below
Since the main focus is on the pollinators, the start of a new plant it could easily be argued that this should have been the starting episode.
Selected material
Fooling the pollinator (sex implied)
Various ways in which orchids fool insects with bogus female look-a-likes
Notable filming, partly inside a flower bud
A wasp using the inside chamber of a fig as a nursery (the young are filmed inside it, just about to leave the nursery). Below they are leaving it. While doing so they get brushed with pollen.
The biggest flower in the world?
Technically the Titan arum is not a single flower but numerous ones, however you would be excused to exclude that fact and taking it as one which would make it the biggest flower in the world. Only while filming the flowering of the plant did scientists finally observe its pollinators; sweat bees.