Mariana explores the growing influence of Mexican cartels in the U.S.

Mariana heads to a Southeast Asian hotbed for scamming, where criminal organizations are holding thousands of hostages and forcing them to scam.

Mariana investigates the mysterious next wave of America's opioid crisis.

Mariana investigates the black-market trade in trafficked brides destined for China.

Mariana investigates the explosive world of heists.

Mariana investigates the growing influence of heavily armed militias.

Mariana investigates the dark underworld of fraudulent addiction treatment programs.

Mariana investigates the global surge in anti-LGBTQ+ violence.

Mariana investigates the deadly world of illegal street racing.

Mariana investigates the underground market for shark fins.