This episode was a mix, for me. I liked the *idea* of the atmosphere, but their language and the script really didn't pull me into the 1890s--I still felt like it was set in the 70s, which made for some incongruities. 

SPOILERS FOLLOW: Also, big inconsistency with the size of the creatures. Supposedly, at the end of the tale, we learn that they are only 5-6" tall, tiny things that only *looked* man-size because of the magnified porthole. Yet they describe the creatures' kingdom, including the queen's throne, decorated with human skulls, which the queen verifies. If the skulls were human-size, the small scale of the creatures would be immediately apparent. 

Still, an okay episode, and the "underwater" voice effect was good.