According to the series mythology, mermaids are a race of creatures whose evolution took place underwater.
"Trust No 1" helps to explore the series' overarching mythology.
Some major differences include large additions to the text for series mythology:
The collection contains the first episodes in the series' mythology, or fictional story arcs.
The episode is one of several that explored the series' overarching mythology.
She is a prominent figure in the series mythology, though did not appear until the middle of the second season.
Further information on the series' mythology and production have been detailed through print.
The season saw drastic changes to the series' alien mythology.
The collection contains the final episodes in the series' mythology, or fictional overarching story.
However, a separate Apep also exists in the series mythology.
