In the final episode of the series, is the 40-year game of cat-and-mouse nearly over? To find out more about Tortoise: Download the Tortoise app - for a listening experience curated by our journalists Subscribe to Tortoise+ on Apple Podcasts for early access and ad-free content Become a member and get access to all of Tortoise's premium audio offerings and more If you want to get in touch with us directly about a story, or tell us more about the stories you want to hear about contact...

In this episode, Chloe looks into what happened to The Gas Man when he arrived back in Germany as a fugitive – and investigates whether his trade with Iran ever really ended To find out more about Tortoise: Download the Tortoise app - for a listening experience curated by our journalists Subscribe to Tortoise+ on Apple Podcasts for early access and ad-free content Become a member and get access to all of Tortoise's premium audio offerings and more If you want to get in touch with us directly...

Chloe makes a startling discovery about another chemical trafficker that has consequences for her investigation. A Kurdish survivor of mustard gas shares her story. To find out more about Tortoise: Download the Tortoise app - for a listening experience curated by our journalists Subscribe to Tortoise+ on Apple Podcasts for early access and ad-free content Become a member and get access to all of Tortoise's premium audio offerings and more If you want to get in touch with us directly about a...

The team persuades The Gas Man to step out from the shadows. He reveals the first big clue in the investigation to how he got away with it – and makes a surprising claim about his role in the case To find out more about Tortoise: Download the Tortoise app - for a listening experience curated by our journalists Subscribe to Tortoise+ on Apple Podcasts for early access and ad-free content Become a member and get access to all of Tortoise's premium audio offerings and more If you want to get in...

Special Agent Bass has his target in his sights but he’s on another continent. If he wants him to talk he’ll need a clever plan – and maybe a bit of luck To find out more about Tortoise: Download the Tortoise app - for a listening experience curated by our journalists Subscribe to Tortoise+ on Apple Podcasts for early access and ad-free content Become a member and get access to all of Tortoise's premium audio offerings and more If you want to get in touch with us directly about a story, or...

In the 1980s Special Agent Dennis Bass received a tip-off that changed the course of his career. 30 years on reporter Chloe Hadjimatheou sets out to solve the mystery of how an international fugitive got away with his crimes – and why he's still on the run. To find out more about Tortoise: Download the Tortoise app - for a listening experience curated by our journalists Subscribe to Tortoise+ on Apple Podcasts for early access and ad-free content Become a member and get access to all of...

Introducing...The Gas Man It starts with a tip-off.  It’s the late 1980s and US Special Agent Dennis Bass is warned about a shipment of suspicious chemicals headed to a secret destination. So he follows the lead – and ends up stumbling into a global plot helping fuel a war. The main suspect? The Gas Man.  In the decades since, Special Agent Bass has been locked in an international game of cat and mouse with the man who supplied a dangerous regime with the chemicals to make weapons. Every time...