It's no secret that espionage and spycraft are common tools in the murky realm of geopolitics -- but not every spy is some sort of James Bond type character in a bespoke suit with a penchant for martinis. In fact, some spies aren't even human. Join Ben and Noel as they dive -- and fly -- into the strange stories of animal spies and nonhuman government operatives, from crows to dolphins, sea lions, cats and more.

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Behind the heavily-guarded walls of the palace, the Ottoman Empire's harem was a world all its own. In the second part of this special two-part episode, Ben, Noel and Max delve into the dangerous world of deceit, espionage and intrigue that defined the lives of people from across the empire, often taken by force from their homes to serve the Sultan.

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For centuries, westerners devoured lurid, embellished stories about the mysteries of Near Eastern culture -- and, chief amid their fascinations, the idea of the Sultan's harem. But what exactly was this thing, and how did it actually work? In the first part of this two-part episode, Ben, Noel and Max bust some myths about the harem system that continue, weirdly enough, in the modern day.

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As Popeye's popularity continued to skyrocket through the Great Depression and the second World War, his pantheon of related characters only grew. And, spoiler: not all of the characters aged well. In the second part of this special two-part episode, Ben, Noel and Max explore how Popeye created a surprising amount of American slang, became a propaganda tool for the allies, and finally answer the question: Does Popeyes Louisiana Kitchen have anything to do with Popeye the Sailor Man?

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Nowadays Popeye the Sailor Man is a world-famous icon, represented in almost any form of media you can imagine. Yet this wasn't always the case. In part one of this special two-part episode, Ben, Noel and Max delve into the story of how Popeye started. Tune in to learn a ridiculous, one-off joke character in a comic strip called Thimble Theatre quickly became the most popular draw of the series, launching a media empire that outlived its creator and continues in the modern day.

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Star Trek is one of the world's most well-known sci-fi franchises, spanning decades in film, TV, books, games and more. While it's had its fair share of lighthearted moments (hello, Tribbles!), its vision of a more equal, peaceful human civilization has made a profound impact on real-world politics and race relations. Join the guys as they explore how a single conversation with a surprising Star Trek fan shaped the course of the show -- and the course of US culture -- in this week's Classic episode.

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Every city has its drawbacks -- parking, for example, or crime, or the price of a decent pizza slice -- but in the 1800s London faced a particularly unusual and disgusting problem: the city literally stank. And this wasn't an occasional whiff of urine or hot garbage from an alleyway, oh no. Instead, a pervasive stench permeated the area, an odor so strong that it disrupted Parliament, forcing the government to take action (and eventually rewriting our understanding of disease in the process).

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The founders of the United States knew the Constitution wasn't perfect, and so they baked in a process for revising their original document. Today, the first few amendments are collectively known as the Bill of Rights -- but, as returning guest AJ Jacobs, author of "The Year of Living Constitutionally" reveals, there have been tons of other proposed amendments that didn't make the cut. Tune in to learn more in the second part of this special two-part episode.

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