I was honestly far more invested in Edith than the actual plot, which was generally fine as plots go. Some great scenes with Dodo in this across the whole episode really. I do wish there was more dialogue from Edith, as scenes in part 2 were mostly the Doctor and Dodo speaking back and forth while Edith is just stood not saying anything. I understand the constraints with the format, but the first story of this set managed to deal with this rather well.