John Hodgman is the writer and “The Daily Show” humorist who likes to portray himself as the unchallenged expert on any aspect of life. He is not. And this one, a biggie, he also got wrong.

Like so many others, he thought the end of the world would come on December 21, 2012. He gathered a faithful audience in Brooklyn and chronicled his end-of-days video. The sun, as we know, rose the next morning, and Hodgman is making amends with “Ragnarok,” a Netflix video account of that night.

Patt Morrison ran him to ground in the Chateau Marmont, where he keeps a panic room exactly for occasions like this.