In the second programme from the Turks and Caicos islands, Tom Heap meets up with marine biologist Mark Parrish to look at the problems facing the critically endangered Rock Iguana.

Mark Parrish is a marine biologist who runs a local eco-tourism business. He tells Tom Heap about the problems facing this critically endangered species, particularly the tendency of feral cats to predate on the young lizards. Cats have been spotted crossing onto the island but the warden Alex Williams is determined to keep the local population safe. He takes Tom to see Rocky, the dominant male, his harem of mates and the young challenger to his crown. Presented by Tom Heap Produced by Alasdair Cross