Punk rocker turned actor Henry Rollins sheds light on the racist origins of marijuana prohibition in the new season of 10 Things You Don’t Know About.

In an interview with Rolling Stone, Rollins discusses the interesting facts he’s learned as host of the H2 Network TV show that has him searching for uncommonly known historical facts and details about subjects such as marijuana prohibition, the Hoover Dam and the Civil Rights Movement.

“If marijuana is legal, then your kids will be imbibing in what those ‘jazz jigaboos’ used to get up to,” says Rollins, summing up the attitude behind Harry J. Anslinger’s 1930’s anti-marijuana campaign as the first commissioner of narcotics in America.

Rollins has no interest in smoking weed himself, but finds the history of marijuana and industrial hemp fascinating. While visiting destinations such as Denver’s Cannabis Cup, the host learns that hemp production used to be so common that it could be found in a Sears catalog. The host even visits America’s only government-funded grow house in Ole Miss, Mississippi.

The episode hasn’t premiered yet, but can be seen later this season Saturdays at 7 p.m. PT on the History Channel’s sister network, H2.