History episode: 

A brief history of nuclear escalation and its nail-biting byproducts

Script and sources: https://medium.com/@nickrroberts/broken-arrows-and-almost-annihilations-ca0ff71cdec8

Referenced in the podcast:

"The Bomb" Making Sense, Sam Harris: https://samharris.org/podcasts/186-the-bomb/, 

The Bomb: Presidents, Generals, and the Secret History of Nuclear War, Fred Kaplan,

Command and Control: Nuclear Weapons, the Damascus Accident, and the Illusion of Safety, Eric Schlosser

Checkpoint Charlie: https://en.wikipedia.org/wiki/Checkpoint_Charlie