It mixes together episodes 3 (Soft Horns), 7 (Here comes the rain, here comes the rainbow), 12 (One-eyed Fish) and 20 (A sea of Ink); telling the origin story in flashback in amongst the the others. As ever, the weakest bits are in the inventions, which are used for tying the episodes together. Otherwise, it is extremely well done.
Interestingly, this too makes the "Call of Cthulhu"-era assumption; the origin story opens as "The turn of the century"; and there is one off-hand remark about the arrival of electric lighting.
[Now playing - Planet Rock]