If you’re claustrophobic and want to start exposure therapy, then we have just the episode for you. There are five people trapped in a tiny submarine two miles beneath the surface near the ruins of the Titanic. They can’t stand. They can’t leave. And in about two days, they won’t be able to breathe either. That, or the sub imploded and they died instantly. One of the two. So if you have a fear of implosions, we’ll work on that too.

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