THIS WEEK ON SUNDAY NIGHT: Inside El Chapo's Cartel

El Chapo may be behind bars, but for the feared drug lord's cartel, it's still business as usual. Sunday Night travels to Mexico to infiltrate the drug empire responsible for much of the heroin, cocaine and methamphetamine smuggled into Australia. Steve Pennells embarks on one of our most dangerous assignments ever - Sunday at 8:15pm on Channel 7.