Season 4
29 episodes · Jan 4, 2026
Season 4 of fern. currently airing in 2026.
Season Videos
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S4E2Why Otto Warmbier Didn't Survive North Korea
Jan 11, 202637mThis is the real story of Otto Warmbier and why the version most people remember may not be true.
S4E3The $1 Billion Coca-Cola Machine
Jan 20, 202616mThis soda fountain isn’t just serving you a drink. It’s quietly collecting your data — and Coke will profit from it tremendously.
S4E4Did McKinsey Ruin Disneyland?
Jan 25, 202630mHow did the "Happiest Place on Earth" become a dangerous nightmare?
S4E5How the Secret Service Actually Works
Feb 5, 202627mWho are the people protecting the President? How do they prepare for the unthinkable, and what happens when everything is on the line?
S4E6The Assassination That Humiliated Hitler
Feb 15, 202619mThis is the story of how Reinhard Heydrich, the most dangerous Nazi, Hitler’s “man with the iron heart”, was assassinated.
S4E7The Most Mysterious Drug in the World
Feb 27, 202636mThis is dimethyltryptamine, known as DMT – arguably the world's strongest psychedelic drug.
S4E8How Iran’s Leader Was Killed
Mar 2, 202614mThis is how the Israeli and U.S. attacks on Iran unfolded - how the country’s leader was killed, and what has happened since then. By the time this video is published, new details may have emerged.
S4E9The Strange Attack on Flight 103
Mar 9, 202628mThis is the story of the Lockerbie bombing, one of the deadliest and most mysterious plane crashes in history.
S4E10Why everyone hates Lego now
Mar 14, 202630mLEGO went from being a family favourite to a multi-billion dollar empire – why do so many people suddenly hate it?
S4E11The Bank Heist of the Century
Mar 22, 202622mA helicopter, a bomb and millions in cash. This is the story of the Västberga heist - one of the most spectacular robberies of all time.
- S4E12
The Most Dangerous Job in Crime
Mar 29, 202622mThis is the insane, brutal world of Europe's coke runners.
S4E13How Cops Robbed the Dark Web King
Apr 5, 202624mA hunt for Dread Pirate Roberts, thousands of stolen Bitcoin and a scapegoat that almost took the fall. This is the story of the cops who robbed Silkroad.
S4E14Who Will Rule North Korea Next?
Apr 12, 202616mThis is the story of Kim Ju Ae, the girl who may rule North Korea one day.
S4E15The Tragic Story of the Air India Survivor
Apr 19, 202621mWhat really helps you survive the extremely unlikely event of a plane crash.
S4E17The World's Deadliest Company
May 3, 202630mThis is the story of the world’s deadliest company: CNTC-STMA. A look into a core part of Chinese state economics and at the devastating effects of a state-sponsored public health crisis.
S4E18The CIA's Most Valuable Spy
May 10, 202631mThis is Operation Rubicon. One of the biggest intelligence coups of the 20th century.
S4E19The Hunt for America's Weirdest Killer
May 18, 202641mThis is the story of the infamous Zodiac killer. A mysterious serial murderer who made himself larger than life – and was never caught.
S4E20The Insane Story of Serbia‘s Human Slaughterhouse
May 24, 202626mThis is the story of one of Europe’s most notorious crime networks and their human slaughterhouse; their alleged ties to Serbia's elites; and an ingenious takedown by relentless investigators.
S4E21We Investigated a New Designer Drug
Jun 3, 202629mThese are Nitazenes, a highly potent but largely unknown class of synthetic opioids that are quietly entering the European drug supply.
S4E22The Man Who Went Undercover in Auschwitz
Jun 10, 202639mThis is the story of Witold Pilecki, the man who infiltrated Auschwitz.
S4E23How Israel Kills Journalists
Jun 19, 202628mThe war in the Gaza Strip is considered the deadliest for journalists in the 21st century. Many are killed in strikes on residential buildings, civilian infrastructure, or directly while on assignment. However, there are also allegations that the Israeli military has deliberately targeted some of them. The IDF denies this. This is the story of journalism in Gaza - and the conditions under which it takes place.
S4E24Why Putin Is So Hard to Kill
Jun 24, 202615mVladimir Putin has a lot of enemies. So how does he protect himself? In this video, we’ll look at four of the Kremlin’s security measures. They tell a story, one about the Russian state and its increasingly paranoid leader.
S4E25The Kid Who Hacked America
Jun 30, 202632mThis is the story of Kevin Mitnick. Vilified by the media. Hunted by the authorities. Feared as one of the world's most dangerous hackers.
S4E26How a $10,000,000 Poker Game Was (Allegedly) Rigged
Jul 8, 202629mThis is the story of an enormous alleged poker scandal.
S4E27Why Is There (Almost) No McDonald‘s in Africa?
Jul 15, 202615mMcDonald’s conquered the world - but not Africa. Why are the golden M’s so rare across the continent?
S4E28The Truth About fern
Jul 22, 202613mThis is how fern became fern, how we make our videos and what's next.
S4E29Hansa: The Infiltration of the Dark Web
Jul 29, 202624mThis is the story of one of the boldest international police investigations of all time, likely the largest trap in Darknet history. This is Operation Bayonet.