Dave travels to the Southern California desert to try and locate the four San Diego county rattlesnake species. The red diamond rattlesnake, the northern Pacific rattlesnake, the speckled rattlesnake and the sidewinder rattlesnake. Find out which snake is the largest, which is the most defensive and which one produces the most toxic venom. With less than a week to achieve his goal the odds are against him. Will persistence pay off or will Dave "strike" out!