National Geographic Channel - Air Date: 2005-2007
This show is usually the toughest and most scientific of the series supernatural shows. Their research is generally good, and their cliff hangers tend to foreshadow an eventual debunking (when that's the outcome) -- the question then becomes not "is it real?" but "how do they know it's not real?" That's a refreshing switch from 50 minutes of credulity followed by a 10-minute "but it's all fake" bit at the end (which often happens with Monster Quest). I saw the chupacabra episode this week, and it pretty well proved: 1) there are more wild dogs in the world than chupacabras (and such animals are often the actual culprits in alleged chupacabra cases), 2) so-called animal mutilations can be achieved by natural processes of decay and predation, 3) some people would rather cling to their own superstitions than believe scientific evidence.