When I started Jon Pertwee's era I wash full of energy and excitement towards this Doctor, after making my way through his five seasons I suppose I have a more measured opinion. I have certainly found his time in the TARDIS inherently more watchable than that of his 1960s counterparts, this is owing to higher production values, the completeness of the archive and for the most part (there are plenty of exceptions) the writing being a little more complex. Jon's Doctor has been energetic, emotional and very wise, but at the same time, five seasons of him I has left me yearning for Patrick Troughton's warmer and less "showy" interpretation of the character. Jon can be patronising and obnoxious to his companions - which is not a trait which I have ever warmed to.

Episode two of Planet of the Spiders (and this is the only episode I am going to slate) pretty much embodies everything I have found troubling about Pertwee's era. The self indulgent chase scene took up the entire episode, it seemed to be made for Pertwee himself rather than the audience. They could have cut it down to best five minutes, or added some narrative and it would have been thrilling - but instead they padded it out beyond belief and there was no real purpose to the chase. This is not a story without padding, each episode recap takes about two minutes for no good reason and the ending of part five doesn't fully recap until ten minutes(!) into part six.

Planet of the Spiders was certainly no failure though. There are bucket loads of redeeming and intriguing features which bring it up to "must watch" status. This is not solely because it is Pertwee's final outing, although he is on fine form throughout his more heroic and subtle moments. His Houdini inspired escape from the spider's web is a perfect example of the kind of playful humour he brought to this story.

This is potentially Mike Yates' best story. Initially I found it odd that Sarah Jane was chatting with him like a pal when her only other story with him he had turned out to be a misguided baddie. Once over this there was a lot of enjoyment to have and I felt that his character was well redeemed, the twist in the previous story having built him up and made him more interesting.

Tommy is a very well handled character. His "simple" nature could look embarrassing with modern eyes, it's certainly playing with fire, but it was very well written and acted. I found myself very invested in this one off character and was glad to see him take on a far greater intelligence. The transition (reading the book and correcting his language) was spine tingling.

There is no doubt that it is the writing and acting which shines best in this story. To get the most out of Planet of the Spiders you have to ignore the CSO, immobile monsters and lack of location filming. Pertwee deals with these challenges admirably - one of his best ever acting moments being when he faces the Great One.

I'm glad that this Doctor regenerated around Sarah Jane and the familiar UNIT crew. Even Jo got a lovely nod in the first episode which helped sign off the era nicely. The Time Lord Buddhist monk regenerating helped prepare The Doctor's age old friends with what was about to happen. The ending of this story could not have been more perfect. The Doctor has a new face again!

I obviously can't wait to see what happens next.