Medusa mentions that Attilan was not always located on the moon. This is consistent with the original comics. When the Inhumans were first introduced by Stan Lee and Jack Kirby in the pages of 'The Fantastic Four' during the 1960s, Attilan was found in a hidden valley in the Himalayan Mountain range in China. It wasn't until John Byrne's run in the early 1980s that Attilan was moved to the Blue Area of the moon. Black Bolt decided to move the entire city to escape the effects of Earthly pollution and disease.
The title of the episode is a reference to the title of the Inhumans-related story in the comic book issue Fantastic Four Vol 1 #44.