User blog comment:Garr9988/Episode Ideas/@comment-5782071-20170421150124

https://en.m.wikipedia.org/wiki/In_the_Abyss

I think I found a good idea for a WH12 episode! HG Wells wrote this story about going to the ocean floor and discovering a civilization there. The background apparently has its origin in the Challenger expedition from the 1870s.

And what ship with the ability to submerge itself and travel underwater do we have?

This makes an excellent idea, a case that shaped a story! And don't worry about the publication date being before 1899, The Time Machine was published in 1895, and the episode with Joshua's Trumpet took place in 1893. Helena's propensity for having her timeline muddled with actually helps keep this idea afloat, if you'll pardon the pun.

Before even seeing this story I had the thought of our agents using it, and while I was thinking of what they'd encounter in the Marianas Trench, mutates fish-people hybrids was a thought I had. Perhaps an artifact mutated a crew on a ship that sunk over the Trench, and they managed to survive bc of it?

Im just... excited that this is an idea Season 12 can definitely use.

Oh, and for Season 12, we would /have/ to explicitly pay attention to the timeline. Maybe make it obvious so as to intentionally poke fun at the IF series.