Part two is tonight, I think, but two things I liked about part one; especially for non divers who watched. The goal was to reach the third chamber where the king is. They had to swim through zero viz to get there so they showed what the divers had to do using a cartoon - that's not the right word but I can't think of it right now. Effective. Also, Josh drove several hundred miles or so (I think) to a pyramid that was set up very much like the one that was submerged so he could see it above ground to better help him with his bearings once he got back underwater. Again, especially for someone like me who can get claustrophobic underwater, it was effective.
The other thing that I've always been amazed at whenever I watch this show is that yeah, Josh goes some amazing places and does amazing stuff but his crew does it even better. They're doing everything he's doing but they're also carrying all this equipment. Especially when he's diving or when he's in tiny places, I'm just in awe of the crew.
So, the cliffhanger from last week was that Josh went back under the pyramid but lost his bearings and the guide line - again, zero viz. Will he be rescued? Will he get out alive? We'll find out tonight

But jokes aside, I'm sure it was very scary. But I'm also sure he's fine.