Cadillacs and Dinosaurs The series followed the exploits of Jack Tenrec and his crew of ecological freedom fighters known as the "Mechanics". His often-reluctant companion is the foreign ambassador Hannah Dundee. She hires Jack as a liaison while she attempts to create clear communication between her land and the modern civilization. Together they confront the serious issues facing the futuristic environment that humanity has come to inhabit. Jack also has Hermes, a juvenile "cutter" that Jack hand-reared after the latter's mother death. Gentle with Jack and Hannah, he can still be rather fierce when angered. The show also includes a race of intelligent lizards called "Griths". Jack and his crew square off against opposition including the Council of Governors and Hammer Terhune's gang.