From the link:
Some of y'all have asked where the Stanislav Petrov episode of Pretty Good went off to. For the time being, we've had to take it down due to rights issues. It's in the shop now, and we plan to have it back up at some point. I'm sorry about that, but I appreciate that you missed it! In the meantime, I am absolutely planning out more episodes of Pretty Good.
I was unaware of comrade Petrov:
Stanislav Yevgrafovich Petrov (Russian: Станисла́в Евгра́фович Петро́в; born 1939 in Vladivostok) is a retired lieutenant colonel of the Soviet Air Defence Forces. On September 26, 1983, just three weeks after the Soviet military had shot down Korean Air Lines Flight 007, Petrov was the duty officer at the command center for the Oko nuclear early-warning system when the system reported that a missile, followed by another one and then up to five more, were being launched from the United States. Petrov judged the report to be a false alarm, and his decision is credited with having prevented an erroneous retaliatory nuclear attack on the United States and its NATO allies that could have resulted in large-scale nuclear war. Investigation later confirmed that the satellite warning system had indeed malfunctioned.
Might have to do a deep dive into this story.