In a small desert town, a biological research scientist (Leo G. Carroll) is experimenting with atomic isotopes on animals with the intention of creating a super nutrient that will take the place of food in the future when overpopulation overtakes the Earth. It has a side effect of making the lab animals grow much faster than normal and when a tarantula escapes from the lab, it's not long before he's terrorizing the countryside. One of many giant creature features that populated the 1950s, this Jack Arnold directed piece of science fiction is one of the better ones. The acting is sub par, the plot far fetched but the special effects are pretty neat and hold up well. It's a programmer that has probably long outlived its expected expiration date but it's good fun. With John Agar as the cardboard hero, Mara Corday as the screaming heroine, Nestor Paiva, Raymond Bailey Ross Elliott and a young Clint Eastwood in one of his earliest film roles as a jet pilot dropping napalm on the tarantula.