I don't hate this one, but there's not enough to it for me to meaningfully enjoy it. The first episode starts off strong with a really creepy atmosphere, but after that it just falls apart a bit. The Sensorites are collectively a bit wet, and the plot thing about how they're only able to tell each other apart based on their outfits is pretty weak. The twist villain being the first contact humans was a bit interesting, but not enough was done with it to really make it compelling. I will give it this, I'm pleased that they gave Susan some interesting stuff to do with her psychic powers and monologue about Gallifrey. On the whole, though, this was the weakest episode of the season.