Host David Attenborough examines reptilian heavyweights that wear a suit of armor. Included: giant tortoises that fit together like spoons while mating; a female spectacled caiman rescuing a huge crèche of babies; saltwater crocodiles that ambush fish.
An examination of snakes includes rattlesnakes seen hunting, a spitting cobra's chemical weapons, the sinuous courtship of kingsnakes and a yellow anaconda delivering its young aquatically. Host: David Attenborough.
Mating strategies of male lizards include monitor lizards that stand on tiptoe; anoles that flash a colorful dewlap; Jacky lizards that wave; wrestling beaded lizards; chameleons that joust in the trees. Also: the world's smallest chameleon and the biggest lizard in Australia. Host: David Attenborough.
David Attenborough examines the advantages of ectothermic life. Included: lizards that are social sunbathers; lizards that use plants as underfloor heaters; female lizards that choose males who claim the hottest rocks.