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...

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...

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...