Skip to Content

The Butterfly King - A series exploring the strange death of King Boris III of Bulgaria. With his country hanging in the balance during the bloodshed of World War II, the official record in the decades since his death was that his death was caused by a heart attack. But award-winning journalist Becky Milligan isn’t that convinced.

“Since when does a sudden death span six days?” asks Milligan. “And here’s another thing that strikes me as odd: King Boris’ skin was covered in spots. I’m no Doctor, but it does not sound like a heart attack to me, and I’m not the only one.”

Could he have actually been poisoned? Who could have killed him? And if he was poisoned, why did the official record not reflect that? All episodes are out now.

Stay in touch

Sign up for our free newsletter

More from Podcast Rex

Crossed Wires Podcast Festival ‘Explodes’ with New Headliners Announced

UK’s biggest podcast festival returns this summer and it’s bigger than ever

February 27, 2026

Recommendation Engine: The Book Club

Plus Mad, Sad and Bad, Ignore That Feeling, and Remember Me?

February 26, 2026

The Golden Lobes: Just One Week to Go for Entries!

Celebrating the funniest moments in podcasting this year

February 25, 2026

Fred Asquith Goes From Viral Videos to Weekly Film Reviews

Social media star turns his comedy success into a podcast reviewing all the latest film and TV

February 23, 2026