Carnival of Monsters is one of those Doctor Who Stories that, without being a classic of the series, stands out quite well in its era. What is particularly noteworthy about this story is the use of colour separation overlay , a trademark of the series and it is probably this story that it was put to the best use in the whole series, other times (like in THE GREEN DEATH and PLANET OF THE SPIDERS) it is quite laughable and cringable. But here, it is quitewellusedprticularly worthy of note was the giant hand picking the TARDIS up at the end of Episode 1.Unfortunately age has affected that technology and these days probably doesn't look quite as good.
I like the Drashigs, they are well realised with the most unusual cry, very original, must go down as one of the best.
The moral aspect of the story is also well realised, showing that the Doctor has a concearn for all creatures, also a trademark of the series in the Pertwee era.
What I don't like is the script. there isn't much in it. I get sick of the going around getting caught bit on the boat. Mind you it is well acted by all those involved. As for the Inter Minor residents, bit of a laughable race aren't they?
By the way, I'm from Australia and when this story was aired on the ABC we got that aweful Version of the theme, I've got a copy of it on Video, glad they didn't use it ever again.
Apart from what I don't like about the story , it has a lot going for it and it is a very entertaining and refreshing story, not letting the viewer get tired with what's going on. It's great to have a simple plot once in a while. If you want to see a story with all the Pertwee trademarks (well almost, no Bessie) this is one to watch. Not a bad one at all.