In the last episode, we measured how deep the ocean really is.

This time, we go down there.

In 1960, Jacques Piccard and Don Walsh descended into the deepest known point on Earth, the Challenger Abyss inside the Mariana Trench. The engineering alone should not have worked. The pressure was enough to crush steel like paper.

And yet… they made it.

But before reaching the bottom, something went wrong.

Cracking sounds echoed through the cabin. Shockwaves rattled the vessel. And the window, one of the strongest ever built, began to fracture.

Decades later, similar incidents followed.
Unmanned submarines damaged. Robotic arms failing. Cables cut. Unexplained sounds recorded in the dark.

Were these just effects of pressure, misinterpreted data, and human imagination under stress?

Or is the deepest part of the ocean still hiding things we don't fully understand?

This episode isn't about proving monsters exist.

It's about how humans react when technology reaches its limits, and certainty disappears.

Welcome back to The Blackwood Files.

In the last episode, we asked a simple question:
How deep is the ocean, really?

This episode begins where that question becomes uncomfortable.

Before humans ever descended into the deepest place on Earth, strange things were already happening in the Mariana Trench. unexplained sounds, damaged equipment, and depths that defied everything scientists expected to find.

In Part 1, we trace the discovery of the Mariana Trench, the moment researchers realized the ocean floor didn't end where it should, and why the deepest place on the planet terrified engineers long before it fascinated explorers.

This isn't the descent yet.

This is everything that came before it.

Part 2 goes all the way down.

We talk about space like it's the final frontier.
But beneath our feet exists a world we barely understand.

In this episode of The Blackwood Files, we begin a descent into the ocean — not poetically, but physically.

From the limits of human diving to the depths where submarines implode…
from creatures that hunt in sunlight to life that survives under crushing pressure…
this episode explores just how deep the ocean really is — and how little of it we've actually seen.

Along the way, we encounter the Midnight Zone, the Hadal Zone, and the deepest point ever reached by humans — Challenger Deep.

This isn't just an episode about depth.

It's about scale.
About darkness.
And about the uncomfortable reality that most of our own planet remains unexplored.

This is only the beginning.