Jillian and Haley dive deep, deep down into the heartbreaking and terrifying story of Deon Dreyer, Dave Shaw, and Don Shirley, and their dives in Bushman's Hole, the third deepest water filled cave in the world.  

Sources: 

Where No One Should Go, Don Shirley, Glynn Washington, and Julia Dewitt, NPR

Raising the Dead, Tim Zimmerman, Outside Magazine

Pickersgill’s Reed Frog, Hyperolius pickersgilli, Amphibian Survival Alliance