Skip to content
Streambay
Expedition Files Season 4 poster
Complete Expedition Files

Expedition Files Season 4 Episode release dates & where to watch

Premiered

Wednesday, April 1, 2026

Ended: Wednesday, June 17, 2026

When does Expedition Files Season 4 come out?

Expedition Files Season 4 premiered Wednesday, April 1, 2026 on Discovery and ended Wednesday, June 17, 2026. The season has 12 episodes.

Last updated

Expedition Files Season 4 release schedule

Expedition Files Season 4 episode release dates
Episode Release date

1. Mysteries of American History

Josh Gates explores American history, including a shocking theory that John Wilkes Booth escaped justice -- only to meet a far stranger fate. Learn myth-busting truths behind Paul Revere's midnight ride and a U.S. Navy sub that vanished in the Cold War.

Wednesday · 7 months ago

2. Deadly Forecast

Josh Gates explores three mysteries shaped by extreme weather, the disappearance of the Donner Party in Sierra Nevada blizzards, secrets of an Arctic missile base entombed in ice, and the Mary Celeste. a ghost ship adrift in the Atlantic.

Wednesday · 7 months ago

3. Fateful Coverups

From a secret World War II unit that deceived Nazis, to the alleged crimes of the Knights Templar, and a royal death tied to a scandal, Josh Gates explores mysteries built on coverups. Was the truth buried to protect power, reputation, and empires?

Wednesday · 6 months ago

4. Under Pressure

Josh Gates reopens cases where the truth stayed buried -- he exposes new clues, shaken alibis, and explosive revelations that challenge everything that we thought we knew about Noah's Ark, the terror of anthrax attacks, and Bugsy Siegel's murder.

Wednesday · 6 months ago

5. Dark Waters

Josh Gates investigates three aquatic mysteries: the Kraken, Lake Lanier and Atlantis. From terrifying sailor lore, to a deadly lake's dark past, and a lost city beneath the sea, he searches for evidence behind legends shaped by fear, myth and history.

Wednesday · 6 months ago

6. Fact or Fiction?

Josh Gates investigates Dracula, Cold War psychic spying, and Spartacus.

Wednesday · 6 months ago

7. Truth Vs. Tabloids

Josh investigates Jim Morrison's death, a "mermaid" in a Japanese temple and an alien abduction claim.

Wednesday · 6 months ago

8. Who Done It?

Josh Gates investigates three of history's most baffling mysteries, uncovering the truth behind the death of explorer Meriwether Lewis, a possible plot around Dag Hammarskjöld's 1961 plane crash, and the vanishing of Judge Joseph Crater.

Wednesday · 5 months ago

9. Larger Than Life

Expedition Files reveals shocking new secrets hidden in our world's most captivating mysteries. With three stories sharing one theme per episode, Josh Gates uncovers stunning revelations, recreating pivotal historical moments in his virtual time machine.

Wednesday · 5 months ago

10. You Don't Know Me

Josh Gates explores hidden identities, from a 50-year-old cold case about a mysterious woman, new evidence that could rewrite the account of Judas' betrayal of Jesus, and the shocking tale of a teenager claiming to be a lost German prince.

Wednesday · 5 months ago

11. The Supernatural

Josh Gates explores the supernatural, from Nikola Tesla's mysterious "Death Ray", to a message from a Sicilian nun believed to be of demonic origin. Plus, scientists uncover the explanation behind the Oracle of Delphi's prophetic visions.

Wednesday · 5 months ago

12. Smoke and Mirrors Finale

Josh Gates explores new evidence reshaping history's mysteries, a fresh analysis of Edgar Allan Poe's death, a novel take on Ponce de León's quest for the Fountain of Youth, and DNA evidence reviving the murder case of Dr. Crippen's wife.

Wednesday · 4 months ago

Expedition Files Season 4 guest stars

  • Sami Jarroush

    Self - Historian

Expedition Files Season 4 FAQ

When does Expedition Files Season 4 come out?

Expedition Files Season 4 premiered Wednesday, April 1, 2026 on Discovery.

How many episodes are in Expedition Files Season 4?

Expedition Files Season 4 has 12 episodes.

Are new episodes of Expedition Files Season 4 released weekly?

New episodes are released weekly.

When is the Expedition Files Season 4 finale?

The Expedition Files Season 4 finale (Episode 12) aired Wednesday, June 17, 2026.

How do I get notified when new Expedition Files Season 4 episodes are released?

Download the Streambay app and follow Expedition Files. You'll get a push notification the moment each new episode is out.

Never miss Expedition Files Season 4.

Download Streambay and follow Expedition Files. We’ll notify you the moment Season 4 is released, and as each new episode comes out. It’s free, with no sign-up and no personal information required.

Coming soon to App Store Get it on Google Play