Explore the groundbreaking investigation into history’s most infamous shark encounters and the legendary sea monsters that might have been apex predators all along.
For fans of history and high-stakes adventure, the return of Discovery Channel’s Shark Week marks the highlight of the summer television season. Among the most anticipated specials in the 2026 lineup is Expedition Unknown: Shark Secrets, featuring the world-renowned explorer Josh Gates.
This investigation promises to peel back the layers of oceanic myth to reveal the truth behind some of the most harrowing maritime mysteries in history. As Shark Week kicks off on Sunday, July 26, 2026, at 8pm ET/PT, viewers are preparing for a week of pioneering science and heart-pounding encounters.
What is Shark Secrets about?
Expedition Unknown: Shark Secrets is a deep dive into the intersection of historical records and marine biology. Hosted by Josh Gates, the special focuses on re-examining legendary shark encounters that have haunted the public imagination for centuries.
The program moves beyond simple nature cinematography, instead adopting a forensic and historical lens to investigate events where sharks and humans collided under extraordinary circumstances. By traveling back in time through archives and onto the water, Gates seeks to provide a definitive shark secrets explained narrative for modern audiences.
Expedition objectives
The primary goal of this Discovery shark investigation is to solve long-standing puzzles involving unidentified or misunderstood sea creatures. Gates and his team are tasked with distinguishing between folklore and fact. Specifically, the expedition aims to apply modern apex predator science to historical accounts of massive sea monsters.
By analyzing bite patterns, survivor testimonies, and environmental conditions from past centuries, the objective is to determine if historical “monsters” were actually known shark species acting in ways that were misunderstood by people of the era.
Key shark discoveries
One of the most significant segments of the shark mystery exploration involves the legendary Stronsay Beast. In 1808, a mysterious carcass washed ashore in Scotland, sparking rumors of a prehistoric sea monster. Gates investigates whether the remains of this creature were actually those of a massive shark, potentially a basking shark or an oversized predator.
Additionally, the special explores the history behind the first recorded shark attack, providing new context on how these early encounters shaped the global perception of sharks as the ocean’s ultimate apex predators.
Field investigation highlights
The investigation takes a somber and intense turn as Gates dives into the mystery surrounding the USS Indianapolis. Following the ship’s sinking in remote waters during World War II, sailors faced a horrific shark feeding frenzy that remains one of the most infamous maritime tragedies in American history.
Through the Josh Gates shark episode, viewers will see field operations that attempt to reconstruct the conditions of the frenzy, investigating the species involved and why the predators behaved with such unprecedented aggression in those specific deep-sea coordinates.
Final summary
Expedition Unknown: Shark Secrets stands out in a week featuring 20 all-new premieres, including K-Pop Shark Heroes and Air Jaws: Red, White and Breach. By combining the investigative rigour of Expedition X with the adventurous spirit of Josh Gates, this special offers a unique perspective on the ocean’s most formidable predators.
As Shark Week begins its celebration on Sunday, July 26, 2026, at 8pm ET/PT, this particular exploration serves as a reminder that while we have mapped much of the world, the secrets held by the deep-sea apex predators are still being revealed.
