Organizations can hire fake advocates who create the illusion of real support for their message. It?s a shady practice called astroturfing that can warp the public perception of anything...even astroturfing.

John Oliver explains how prosecutors use, or in some cases misuse, their power within our criminal justice system and why it?s important to know whether or not your district attorney is a dog.

With a national dialogue underway about sexual harassment in the workplace, John Oliver sits down with Anita Hill to discuss the recent response to a not-so-recent problem.

Scientists are developing new ways to alter the genetic code of living organisms. John Oliver explores the risks, rewards, and wolf-related hazards of gene editing.

Mexico is on the verge of a major election. John Oliver discusses some things we should know about the races and one thing we should not know about Santa Claus.

Chinese president Xi Jinping is amassing an alarming amount of political power. If only his propaganda videos made the idea of unrestricted authority seem as troubling as the concept of singing children.

Last Week Tonight explains how the president and his allies seek to undermine Robert Mueller?s inquiry into Russian interference in the 2016 election.

Examining the highly unregulated system around guardianship for senior citizens, Last Week Tonight enlists a few celebrities to help warn against such predatory behavior.

John Oliver uncovers the dangerously unregulated rehab industry, which offers little evidence-based care and too many horse-based therapies.

Last Week Tonight looks at the devastating economic crisis in Venezuela and makes an unconventional appeal to the country?s leader, Nicol�s Maduro.

Rudy Giuliani is new to Drumpf?s legal team, but not to public controversy. Last Week Tonight examines his turbulent record in the wake of his recent political upsets.

Donald Trump could soon dismantle the agreement designed to curb the Iranian nuclear program. Our Catheter Cowboy will do his best to keep that from happening.

As the deadline to file rapidly approaches, Last Week Tonight looks at how many of America?s largest corporations shift a surprising portion of their profits overseas to avoid paying taxes. Even more surprisingly ? it?s legal.

Crisis pregnancy centers deceptively steer women away from abortion. They can be started way too easily by religious groups like, for instance, a late night talk show?s megachurch.

America?s dysfunctional immigration court system forces many children to appear in court alone. That?s as ridiculous in real life as it would be on a courtroom television show.

John Oliver can't help but say nice things about the Vice President's rabbit, Marlon Bundo. Last Week Tonight even wrote a children's book about him.

Digital currencies are generating a lot of excitement. John Oliver enlists Keegan-Michael Key to get potential investors equally excited about the concept of caution.

The NRA's streaming lifestyle network aims to boost gun sales, often by using an ominous tone that would make just about anything sound terrifying...including muffins.

America's reputation is being damaged by its own president. John Oliver, several dinosaurs, and the NYC Gay Men's Chorus remind the world that our country is...complicated.