The Professor recounts what the Black Death was like, consulting a rat and Death himself.

The Professor delves into an old catfishing scheme and the role it played in parting a queen with her head.

A White Star Line employee survived the sinking of both the Titanic and its sister ship - what do the Professor and a notorious propeller have to say about it?

In the season finale, the Professor talks dancing mania in Strasbourg in 1518, the famous incident where those people in France danced till they died.

The Professor dissects the Baltimore Plot, the other attempt to assassinate Abraham Lincoln.

The Professor takes his first foray into ancient history with the destruction of Pompeii by the singing Mt. Vesuvius.

The Professor tackles Egyptian history for the first time, with the female pharaoh Hatshepsut and two Ryan(n)s.

The Professor tells the tale of an eventful year at the Olympic Games.

The Professor recounts how a regular counterfeiter attempted to con the world's most intelligent person - and almost got away with it.

The Professor tells the insane tale of samurai Miyamoto Musashi, who accumulated a large body count and reputation for being unfashionably late.

The Professor shares the story of Policarpa, a revolutionary teenage sewing spy.

In a spooky season finale, the Professor recalls that time those people ate each other in the mountains.

THERE'S A MONSTER IN THEM THAR WOODS!

Kate Peterman learns about one great stool. A stool sings about stools!

Zach Kornfeld learns about the enigmatic Ziryab. An oud sings about a dream he had.

France is at it again.

Joyce Louis-Jean learns about an enterprising swashbuckler. Boat sings a banger.

F.M.E

Emus become the target as the Professor recounts Australia's great war.

Ryan and Ify each rack up millions of jelly beans from the generous Professor and Mansa Musa.

Scabs n Pus infect Puppet History as the Professor talks smallpox during the American Revolution.

It's off to the Philippines for the Professor to meet an impressive polymath who just wanted to write books but sparked a revolution.

The Professor travels back to Kievan Rus' to meet a vengeful female regent.

It's back to France to exorcise a possessed convent and tear down a wall.

This one's got it all! Hippos! Sworn enemies! TNT! Yes sir, it's an absolute rip-roaring start to yet another perfectly normal season in which everything is exactly as it seems.

Brian David Gilbert learns about windows and going out of them. The musical guest? It's a window.

Maya Murillo learns about some competent sisters. Infinitiger roars.

Ryann Graham learns about an inspiring flyer. A weird cloud visits.

Aria Inthavong learns about why modern medicine is good. Ryan is kidnapped.

The Professor's parents learn about their fate. Shit goes crazy.

Steven Lim returns to learn about a saxy guy. A fucked up instrument stops by.

Joyce Louis-Jean learns about Wu Zetian. Dragon sings about bonin'.

Ricky Wang learns about toxic fandom. The hippodrome gives a fiery performance.

Kwesi James learns about a woman with a hungry heart. THE Cupid visits!

Zach Kornfeld returns to learn about some classic pope stuff. And a visit from a pope hat!

Sara Rubin returns to learn about a pretty harrowing expedition. An entire continent sings a song.

Let's get mathematical!

Hold onto your... well, you get it.

Don't tell France her husband's dead!

Learn about a sexy man, why not.

Do you have what it take to be England's Next Top Court Jester?

Sometimes ya gotta rise up.