Tortoise Investigates Episodes Available now
6. Devil's Breath—The Gas Man
Is the 40-year cat-and-mouse game nearly over?
5. Truth Serum—The Gas Man
What happened to The Gas Man when he arrived back in Germany as a fugitive?
4. The Other Gas Man—The Gas Man
Chloe makes a startling discovery about another chemical trafficker.
3. The Escape—The Gas Man
The team persuades The Gas Man to step out from the shadows.
2. The Sting—The Gas Man
Special Agent Bass concocts a plan to reach the Gas Man.
1. The Special Agent—The Gas Man
Special Agent Dennis Bass receives a tip-off that will change the course of his career.
Introducing... The Gas Man—The Gas Man
In the late 1980s, Agent Bass is tipped off about a shipment of suspicious chemicals.
5. The special relationship—Who Trolled Amber?
Could a nation state have deployed an online army to fight for Johnny Depp?
6. Public enemy—Who Trolled Amber?
Johnny Depp鈥檚 maverick lawyer Adam Waldman finally comes under scrutiny.
4. Through the looking glass—Who Trolled Amber?
The astonishing case of a teenage killer helps lift the lid on how bot campaigns work.
