Lizards. Yvonne Ellis concludes her series about sophisticated reptiles. In the Galapagos Islands she swims with marine iguanas; on the island of Rinca in Indonesia she comes face to face with the giant komodo dragon, which breathes harmful bacteria instead of fire; and in the Sonoran Desert of North America she coaxes a venomous gila monster from its lair. Producer Brett Westwood Repeated tomorrow at 11am