Just saw "Terror of the Autons". Wow, what a difference! The introduction of the Master and Jo Grant, but more than that, the story is tighter, faster, more action packed, more interesting... Also the production values looked a lot better too, not as embarrassing as Pertwee's first season. This is the kind of 3rd Doctor story I remember as a kid!
Interesting: Terror of the Autons is the sort of Pertwee I loved as a kid... and was immensely disappointed by when I saw it again as a teenager. Whereas I loved season seven when I saw it at 17, and still do on each rewatching.