When Graham Williams applied to be the producer of Doctor Who in 1976 as part of his application he proposed the Key To Time story arc, which would encompass an entire season of Doctor Who.
A story arc in itself would be nothing new for Doctor Who as Season 8 was a Master storyline arc ending in his capture at the end of The Dæmons. Also some of Tom Baker's 1st season (Season 12) involved the ongoing plot of the space station Nerva.
The Key to Time was aired from September 1978 - February 1979.
The season is set up at the beginning of The Ribos Operation where The White Guardian summons The Doctor who has just finished building K9 MK II, we (the viewers) having seen The Doctor dragging a box saying K9 MK II on it into the console room at the conclusion of The Invasion of Time, having left the original K9 on Gallifrey with Leela when she chose to stay there, again at the conclusion of that story.
The White Guardian explains that a powerful artefact called The Key To Time has been split in to 6 pieces as it is far to powerful for any one being to possess and has been dispersed throughout time and space. However a time is approaching rapidly where The White Guardian needs to restore the equilibrium of the universe and he needs The Doctor to recover it.
The task will be made all the more difficult as the pieces are disguised and could be anything. The Doctor will have a tracer device to help locate the pieces. He has also been given a new assistant to help him on his task a Time Lady called Romanadvoratrelundar.
The Bar will be watching the entire Key to Time season on Wednesdays starting this Wednesday (13th March). The Bar will open at 7:30pm GMT and we will press play at 8pm GMT.
I do hope you can join me.