Rate "The Mutants"

Resuming this role as the Time Lord's galactic yo-yo, the Doctor is given a box that can only be opened by one person, and sent to the planet Solos in the dying days of Earth's empire.  Coinciding with the arrival of the Doctor and Jo is a maniacal Marshal, whose grand plan is to convert the atmosphere of Solos into one more suitable to humans.  This, obviously, is opposed by the native Solonians.  But they seem to have an even bigger issue on their hands, as some form of plague has struck them, causing them to mutate into hideous creatures.  What is this mutation?  And what do the stone tables into the special box the Time Lords provided the Doctor mean about the mutation?

Let's be hearing from you on your thoughts about "The Mutants."

Rick James.

That is all.