Please keep in mind that the Doomsday Preppers show is part of a NatGeo series called "American Outliers". The folks you see on the show are chosen to be extreme in a rather obvious attempt to paint all preppers as whack jobs. Given the reaction to the show, I'm not certain it's working out that way.
“Doomsday Preppers show is part of a NatGeo series called “American Outliers”.
I have not seen or heard of “American Outliers” and find no reference to it in the search engine, but Doomsday Preppers
has numerous links.
The National Geo feed to Asia may vary from that in the US.