The Three Doctors - The first, second and third Doctors team up in this epic serial that borders perfection. William Hartnell sadly only plays a limited role due to his failing health but, thankfully, Troughton is here in full force and he absolutely knocks it out of the park in his return to the series. Pertwee and Troughton are a great onscreen pair and we truly see the best of what their respective Doctors have to offer. In this serial, The Doctors have to work together to deal with the threat of Omega, one of the founding time lords bent on returning in order to seek revenge. It's a bit of a slow build but with Omega acting as a quality villain, whom outside the Master is something that Pertwee's run really lacked, The Three Doctors lives up to expectations and is a gem among Pertwee's run.
The Green Death - I feel like this is the only serial of the season to use most of its 6 episodes to actually tell a story and kept the filler at least somewhat in check. Although I still would have trimmed it down from 6 episodes to 5, I'll acknowledge that it isn't as terrible with filler as Frontier in Space and Planet of the Daleks is. This serial also marks the exit of Katy Manning (Jo Grant) from the series and, thankfully, the serial heavily focuses on her character so we get a fair amount of screentime with her and get to truly enjoy her final performance before she leaves. All in all, The Green Death tells an OK story with some decent characters and manages to secure a place near the top of a poorly edited season.
Carnival of Monsters - This is certainly a serial I would like to see them re-write because it started off strong but absolutely faded into the second half. Multiple needless plot threads, Awful looking set and costume designs on top of having such a forgetful finish left me more disappointed than anything because I actually wanted to like this one. For the Doctor's first piloted adventure off earth (during Pertwee's run that is), It is a frustrating serial to watch because it could and should have been better. Especially with such an interesting premise.
Frontier in Space - Sadly, This is Roger Delgado's final appearance as the Master as he tragically died in a car crash. RIP, You were the best Master that the show has had and always will be. That being said, Pertwee's run suffered from having a lot of overly long serials, Frontier in Space is the perfect example of that. With 6 painfully long episodes that suffered from slow-pacing and extended action scenes that did little to add excitement, This serial still makes me wish it could take a trip to the cutting room floor. I think 4 episodes would have been a perfect fit for this one. It would have cut out the filler, quickened the pace and not want me to go to sleep when watching it.
Planet of the Daleks - What I said about Frontier in Space echoes in the immediate sequel serial to it, Planet of the Daleks. 6 episodes is awfully long when you have to deal with a much weaker story than what Frontier in Space had. It fails to properly carry the Daleks as villains and their interactions with the Doctor is largely kept to a minimum, which is pretty frustrating since they have been the core villain of the franchise since the very beginning. And much like Frontier in Space, A proper edit would have improved it but it wouldn't have saved it from still being a mediocre serial with a woefully inconsistent story that can't seem to decide on what kind of theme it wants to be. However, A proper edit would have gotten rid of the filler, improved the pacing and not make it such a chore to sit through.