Mariana van Zeller investigates underground plastic surgery, from motel-room operations to a deadly revelation about Miami’s discount surgery centers.

Mariana meets the villains behind an exploding online romance scam.

Mariana sets off on a wild journey through California’s black market for weed, which has mushroomed since marijuana legalization four years ago.

Mariana van Zeller investigates outlaw motorcycle gangs known as 1% clubs, learning about the bonds of brotherhood that fuel these violent groups.

Mariana van Zeller follows a meth superhighway from a cartel-run lab in Sinaloa across the border and into the lives of American users.

Mariana exposes a racist underground movement hellbent on a violent future.

Mariana tracks a smuggling route of stolen cars from the U.S. to West Africa.

Mariana investigates a new breed of cocaine trafficker: lady bosses.

Mariana investigates the criminals destroying the Amazon rainforest.

Mariana explores the billion-dollar underworld of illegal fishing.