If I'm being generous, I can say that this was probably hampered by its format and the practicalities of fitting a story onto two sides of a record. I can imagine that the novel is better.

Right, I've been generous enough. This is a supremely unsatisfying story that moves in leaps and bounds, a bit like getting the first and last five minutes of every episode in a serial and nothing in between. I can't take the Pescatons seriously, and the Doctor and Sarah both seem unusually hapless. Worse still, it has some truly ear-splitting sound effects. The only good thing I can say about it is it has a few funny lines of dialogue.