Somewhere in here is the plot of Ghost Light. Light (John Hallam) has taken human form and came to Earth in his spaceship to catalogue everything. Only to learn that everything keeps changing.
The catalogue for the planet is never ending and a frustrated Light wants to destroy the planet.
Meanwhile Josiah plans to assassinate Queen Victoria and take over the British Empire. While Control wants to be her own woman.
There certainly is a lot of story here but it had to be cut down. Control with her Eliza Doolittle story. Ace and her backstory regarding the house and its evil presence.
Josiah's plan is just absurd and Light's confusion is based on the concept that other planets do not evolve.
Some of the acting was all over the place. Like the director could not have a consistent tone. McCoy lets himself down in one scene where he just cannot do dramatic.
It is a grisly story with one set of characters turned to stone and Inspector Mackenzie into primordial soup.
Ghost Light had some cracking lines that hark back to Douglas Adams. It was all a sign of what Doctor Who could had been if it continued.