Shockingly watchable for a 12-part Hartnell story where 9/12 episodes are missing. The whole thing does get a little repetitive and meandery at times and I'm not the biggest fan of the Daleks, but it jumps around enough in setting to keep the whole thing going, and the climax in the final episode absolutely pays off. If I could bring back one single missing episode of Classic Who, it might just be episode 12 of this.