Tall tales of giant man-eating crocodiles inhabit a world between fact and fiction. The truth is that some crocodile species, such as Nile crocs and American crocs, have been known to exceed 20 feet; the Asian-Pacific saltwater croc has been recorded to 23 feet. Today these gigantic creatures are very, very rare, but some of them are still out there in the wild, with a few held in captivity. Renowned herpetologist Romulus Whitaker attempts to ensure the future of the last of these leviathans.

Sunday, 9/21/08 from 7-8 p.m. ET