The Third Dive: The Death of Rob Stewart. A film by Robert Osborne. World Broadcast Premiere, Oct 26, 9PM, CBC Docs POV

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Why did marine activist Rob Stewart die? Was there negligence? And was there a cover-up?

Dam Builder Productions presents

THE THIRD DIVE: The Death of Rob Stewart
Written, produced, directed by Robert Osborne

The Documentary looks at the events surrounding the tragic loss of Canada’s world-famous shark protector Rob Stewart.

 Premieres on CBC Docs POV, October 26, 9:00PM (9:30 NT) and online at the CBC TV streaming app and from 12noon the same day.


In his 37 years, Rob Stewart had seemingly spent more time underwater than above. The Toronto-born marine biologist fueled a literal sea-change with his 2006 documentary Sharkwater, about the endangerment of the seas’ top predator, and led an activist movement that saw more than 100 countries ban shark products.

And it was on January 31, 2017, while seeking revolutionary footage of sawfish sharks mating near the wreck of the Queen of Nassau off the Florida Keys, that Stewart drowned in a bizarre series of events.

As detailed in Robert Osborne’s The Third Dive, both Stewart and his diving instructor Peter Sotis made a risky third deep-dive of the day using “rebreather” apparatus, in murky waters that frustrated filming efforts. Both divers seemed okay when reaching the surface. But Sotis lost consciousness after climbing onto the boat. Stewart apparently lost consciousness also, as the boat was swinging around to meet him. He disappeared, and his body was discovered by a remote submersible search vessel three days later.

The Third Dive traces those events within the context of Florida Keys politics and accusations of whitewashing from within its community. Despite its reputation as a haven for ocean fun-seekers and pristine waters, at least 36 people drowned off the Florida Keys from 2013-2017. Many of them were mere statistics, attracting little notice in the media, but Stewart was not. Within 24 hours of his disappearance, it became clear that his plight would bring the attention of the world on the Keys’ community.

The Third Dive interviews forensic pathologist, Tom Beaver, who so distrusted local officials that he personally shipped Stewart’s diving gear to Panama City for analysis by the U.S. Navy, and who was fired by the community before he could complete his investigation on the cause of death.

The documentary also features journalist David Goodhue, editor of the Upper Keys Reporter, who relates being “spun” by locals with the narrative that Stewart was an inexperienced diver exploring beyond his limits. Was Stewart being “thrown under the bus,” as one witness observed, all in the name of protecting the Florida Keys’ lucrative tourist industry?

And for the first time, the man many accuse of causing Stewart’s death speaks out. Peter Sotis was pilloried in public after Stewart’s death, many accusing him of selfishly climbing back on to the dive boat and leaving Rob to drown. But, Sotis tells a very different story.

Osborne, a Canadian Screen Award-winning documentarian and senior producer of his Dam Builder productions, has brought over 3 decades of experience, including his years as an investigative reporter for CBC and CTV, to bear on the mystery of Rob Stewart’s death – a loss to the world of eco-activism and a life that still serves as an inspiration. Osborne is also a certified technical diver, a specialty that allowed him some unique insights into the events.

“Throughout the investigation and the filming, I tried to never lose sight of what Rob Stewart accomplished,” says Osborne. “He virtually saved a species single handedly and I felt that achievement should be reflected in the film.”

About Robert Osborne | Dam Builder Productions
Robert Osborne is the Senior Producer of Dam Builder Productions, and Jari Osborne is the Executive Producer. Robert has more than 30 years of working in long format television. For much of that time he was an investigative journalist working for the CTV show W5. He’s also worked for Marketplace and Pacific Report. Robert has developed a specialty in directing underwater-based documentaries. He holds nearly a dozen certifications including a cave-diving specialty. Robert has won more than half a dozen RTNDA Awards, a CAJ Award and an Award of Merit from the Governor General. He has been nominated countless times for Gemini awards and has been part of a team that won two. In 2012 he was nominated for a CSA Award for Unlocking Alex. Robert’s last film Unstoppable was an investigation inside the fentanyl epidemic sweeping across North America.  The documentary, broadcast in 2016, has proved to be prophetic: “There’s still no sign that any government fully understands what a virtual force of nature this drug has become,” says Robert. He won a CSA for best writing in a documentary for Unstoppable. Dam Builder Productions has also produced documentaries for the CBC’s The Nature of Things and for the Discovery Channel.

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