Season 0 of Huumebisnes Oy premiered on November 24, 2013.

Season 1 of Huumebisnes Oy premiered on July 11, 2010.

Season 2 of Huumebisnes Oy premiered on January 1, 2012.

Season 3 of Huumebisnes Oy premiered on October 21, 2012.

Balancing heartbreaking user interviews, unflinching footage of addicts "shooting up," and incredible access to the armed drug dealers and gang members who supply them, Drugs Inc. also joins the front lines with the local and federal law enforcement agencies charged with combating the country's drug problem.

Season 4 of Huumebisnes Oy premiered on August 11, 2013.

Returning for a fourth season, National Geographic Channel's series Drugs Inc. opens viewers eyes with a 360° approach to the drug trade. With intimate firsthand, street-level testimonies from those at the front lines and back alleys of the drug trade — traffickers, dealers, users, federal agents and cops — the investigative series examines the $350 billion-a-year industry from all angles.

Season 5 of Huumebisnes Oy premiered on June 29, 2014.

Drugs, Inc. goes deep into the multi-billion-dollar industry that fuels crime and violence like no other substance for an intimate, firsthand view from those at the front lines and back alleys of the drug trade - traffickers, dealers, users, and cops.

Season 6 of Huumebisnes Oy premiered on November 12, 2014.

Drugs, Inc. is back. And season 6 features episodes with an all new approach. Every city has a drug scene. But when big events happen, drug dealers take bigger risks for bigger returns.

Season 7 of Huumebisnes Oy premiered on September 16, 2015.