The Keeper of Traken is a memorable enough episode that certainly resonates with continuity heavily. The introduction of Traken, the Tremas Master, and Nyssa obviously would have major consequences on the continuity of the show, and as such these are often referenced and referred to episodes. They are a little boring and stiff though. The planet of Traken is realized well but the story and characters felt a little bland to me.

It should be more fun having the Doctor and Adric on an adventure but the latter feels a bit wasted, while I got the sense from the former's performance that this definitely was the era of the show that drove Baker away from the role at the time. I can't blame him either - while Keeper of Traken retroactively has this weight to it given how important a story it is for what was to come, the episodes themselves are comparatively quite weak on the whole.